wanyu/IteraTeR_v2 huggingface dataset:
Original: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is  a key ingredient for life, therefore the (former) presence of water on Mars may point to the (former) existence of extraterrestrial life  .
Revised: NASA view of Mars exploration Studies of Mars point to evidence of the presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is a key ingredient for life, therefore the (former) presence of water on Mars may point to the (former) existence of extraterrestrial life .
Edit intent: clarity
Original: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is  a key ingredient for life, therefore the (former) presence of water on Mars may point to the (former) existence of extraterrestrial life  .
Revised: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and a vast amount of underground ice near the equator , are being published in the scientific journal nature today . Liquid water is a key ingredient for life, therefore the (former) presence of water on Mars may point to the (former) existence of extraterrestrial life .
Edit intent: clarity
Original: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is  a key ingredient for life, therefore the (former) presence of water on Mars may point to the (former) existence of extraterrestrial life  .
Revised: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is believed to be a key ingredient for life, therefore the (former) presence of water on Mars may point to the (former) existence of extraterrestrial life .
Edit intent: clarity
Original: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is  a key ingredient for life, therefore the (former) presence of water on Mars may point to the (former) existence of extraterrestrial life  .
Revised: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is a key ingredient for life, therefore the presence of water on Mars may point to the (former) existence of extraterrestrial life .
Edit intent: fluency
Original: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is  a key ingredient for life, therefore the (former) presence of water on Mars may point to the (former) existence of extraterrestrial life  .
Revised: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is a key ingredient for life, therefore the (former) presence of water on Mars helps support chances of extraterrestrial life .
Edit intent: clarity
Original: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is  a key ingredient for life, therefore the (former) presence of water on Mars may point to the (former) existence of extraterrestrial life  .
Revised: NASA view of Mars exploration Three studies of Mars , which point to the recent presence of liquid water on the planet's surface and present vast amounts of ice underground near the equator , are being published in the scientific journal nature today . Liquid water is a key ingredient for life, therefore the (former) presence of water on Mars may point to the (former) existence of extraterrestrial life , reported the journal Nature today .
Edit intent: coherence
Original:  In the studies, strong indications of recent glacial and current volcanic activity are presented.
Revised:  In the studies, strong indications of glacial and volcanic activity were presented.
Edit intent: clarity
Original:  The combined research on this subject, including a study in December 2004 stating five volcanoes on Mars have been active as shortly as two million years ago, justifies a further search for signs of life on Mars, scientists say.
Revised:  The combined research on this subject, including a study in December 2004 indicating that five volcanoes on Mars have been active as shortly as two million years ago, justifies a further search for signs of life on Mars, scientists say.
Edit intent: fluency
Original:  The combined research on this subject, including a study in December 2004 stating five volcanoes on Mars have been active as shortly as two million years ago, justifies a further search for signs of life on Mars, scientists say.
Revised:  The combined research on this subject, including a study in December 2004 stating five volcanoes on have been active as shortly as two million years ago, justifies a further search for signs of life on Mars, scientists say.
Edit intent: fluency
Original:  The combined research on this subject, including a study in December 2004 stating five volcanoes on Mars have been active as shortly as two million years ago, justifies a further search for signs of life on Mars, scientists say.
Revised:  The combined research on this subject, including a study in December 2004 stating five volcanoes on Mars have been active as recently as two million years ago, justifies a further search for signs of life on Mars, scientists say.
Edit intent: clarity
Original:  The combined research on this subject, including a study in December 2004 stating five volcanoes on Mars have been active as shortly as two million years ago, justifies a further search for signs of life on Mars, scientists say.
Revised:  The combined research on this subject, including a study in December 2004 stating five volcanoes on Mars have been active as shortly as two million years ago, justifies further search for signs of life on Mars, scientists say.
Edit intent: fluency
Original:  New images received from Mars taken by the High Resolution Stereo Camera (HRSC)
Revised:  New images taken of the landscape by the High Resolution Stereo Camera (HRSC)
Edit intent: clarity
Original:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows  Mars was hotter and more humid billions of years ago than it is today.
Revised:  on the European Space Agency ' s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows Mars was hotter and more humid billions of years ago than it is today.
Edit intent: fluency
Original:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows  Mars was hotter and more humid billions of years ago than it is today.
Revised:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows Mars was hotter and more humid billions of years ago than it is today.
Edit intent: clarity
Original:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows  Mars was hotter and more humid billions of years ago than it is today.
Revised:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Some evidence of the water, collected by the two Mars rovers that NASA currently has exploring the planet, shows Mars was hotter and more humid billions of years ago than it is today.
Edit intent: clarity
Original:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows  Mars was hotter and more humid billions of years ago than it is today.
Revised:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by two Mars rovers that NASA currently has exploring the planet, shows Mars was hotter and more humid billions of years ago than it is today.
Edit intent: fluency
Original:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows  Mars was hotter and more humid billions of years ago than it is today.
Revised:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA sent to explore the planet, shows Mars was hotter and more humid billions of years ago than it is today.
Edit intent: clarity
Original:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows  Mars was hotter and more humid billions of years ago than it is today.
Revised:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows that Mars was hotter and more humid billions of years ago than it is today.
Edit intent: fluency
Original:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows  Mars was hotter and more humid billions of years ago than it is today.
Revised:  on the European Space Agency ’ s Mars Express Mission show that flowing water, large glaciers and active volcanoes have also taken their toll on the face of Mars in the past few million years, which is a mere minute on the geological timescale of Mars, which has been around for 4.5 billion years . Evidence of past water, collected by the two Mars rovers that NASA currently has exploring the planet, shows Mars was hotter and more humid millions of years ago than it is today.
Edit intent: clarity
Original:  Also important are active volcanoes , which can stimulate the forming of microbial life , as they do on Earth.
Revised:  Also important were active volcanoes that can stimulate the forming of microbial life , as they do on Earth.
Edit intent: fluency
Original:  Also important are active volcanoes , which can stimulate the forming of microbial life , as they do on Earth.
Revised:  Also important are active volcanoes , which can stimulate the forming of microbial life as they do on Earth.
Edit intent: fluency
Original:  Scientists have already discovered bacteria near crater mouths on Earth that live off sulfur instead of oxygen . Signs of methane in Mars' atmosphere also interests researchers , indicating possible volcanic activity or subsurface life, the detection of methane remains controversial in the scientific community .
Revised:  Scientists have recently discovered bacteria near crater mouths on Earth that live off sulfur instead of oxygen . Signs of methane in Mars' atmosphere also interests researchers , indicating possible volcanic activity or subsurface life, the detection of methane remains controversial in the scientific community .
Edit intent: clarity
Original:  Scientists have already discovered bacteria near crater mouths on Earth that live off sulfur instead of oxygen . Signs of methane in Mars' atmosphere also interests researchers , indicating possible volcanic activity or subsurface life, the detection of methane remains controversial in the scientific community .
Revised:  Scientists have already discovered bacteria near crater mouths on Earth that live off sulfur instead of oxygen . Signs of methane in Mars' atmosphere also interests researchers who believe it indicates the possiblity of subsurface life .
Edit intent: clarity
Original:  Further examination, by geologist James Head of Brown University and his group , of landforms thought to be glacial during the Viking program in the 1970s were found to be evidence of geologically recent glacial activity near Mars' equator.
Revised:  Geologist James Head of Brown University and his group , of landforms thought to be glacial during the Viking program in the 1970s were found to be evidence of geologically recent glacial activity near Mars' equator.
Edit intent: clarity
Original:  Further examination, by geologist James Head of Brown University and his group , of landforms thought to be glacial during the Viking program in the 1970s were found to be evidence of geologically recent glacial activity near Mars' equator.
Revised:  Further examination, by geologist James Head of Brown University led a group of researchers who examined landforms thought to be glacial during the Viking program in the 1970s were found to be evidence of geologically recent glacial activity near Mars' equator.
Edit intent: clarity
Original:  Glaciers appear to have moved from the Martian poles to the equator between 350,000 and 4 million years ago .
Revised:  Glaciers appear to have moved from the poles to the equator between 350,000 and 4 million years ago .
Edit intent: clarity
Original:  Glaciers appear to have moved from the Martian poles to the equator between 350,000 and 4 million years ago .
Revised:  Glaciers appear to have moved from the Martian poles to the equator between 350,000 and 4 million years ago suggesting that
Edit intent: coherence
Original:  The third study pertains to a piece [[   of frozen water roughly the size of the North Sea , which has formed near the equator in the last five million years and is now thought to have been formed by liquid water carried along by volcanic eruptions in a region known as Cerberus Fossae.
Revised:  The third study pertains to a piece [[ . of frozen water roughly the size of the North Sea , which has formed near the equator in the last five million years and is now thought to have been formed by liquid water carried along by volcanic eruptions in a region known as Cerberus Fossae.
Edit intent: fluency
Original:  The third study pertains to a piece [[   of frozen water roughly the size of the North Sea , which has formed near the equator in the last five million years and is now thought to have been formed by liquid water carried along by volcanic eruptions in a region known as Cerberus Fossae.
Revised:  The third study pertains to a piece [[ A third study looks at an area of frozen water roughly the size of the North Sea , which has formed near the equator in the last five million years and is now thought to have been formed by liquid water carried along by volcanic eruptions in a region known as Cerberus Fossae.
Edit intent: clarity
Original:  The third study pertains to a piece [[   of frozen water roughly the size of the North Sea , which has formed near the equator in the last five million years and is now thought to have been formed by liquid water carried along by volcanic eruptions in a region known as Cerberus Fossae.
Revised:  The third study pertains to a piece [[ of frozen water roughly the size of the North Sea . It formed near the equator in the last five million years and is now thought to have been formed by liquid water carried along by volcanic eruptions in a region known as Cerberus Fossae.
Edit intent: coherence
Original:  The third study pertains to a piece [[   of frozen water roughly the size of the North Sea , which has formed near the equator in the last five million years and is now thought to have been formed by liquid water carried along by volcanic eruptions in a region known as Cerberus Fossae.
Revised:  The third study pertains to a piece [[ of frozen water roughly the size of the North Sea , which has formed near the equator in the last five million years and is now thought that it was once liquid water carried along by volcanic eruptions in a region known as Cerberus Fossae.
Edit intent: clarity
Original:  Though researchers have long assumed water on Mars had all evaporated into the Martian atmosphere , a 1991 hypothesis, then considered outrageous , stating Mars has known flooding in recent times , is now supported by the findings.
Revised:  Researchers have long assumed water on Mars had all evaporated into the Martian atmosphere , a 1991 hypothesis, then considered outrageous , stating Mars has known flooding in recent times , is now supported by the findings.
Edit intent: coherence
Original:  Though researchers have long assumed water on Mars had all evaporated into the Martian atmosphere , a 1991 hypothesis, then considered outrageous , stating Mars has known flooding in recent times , is now supported by the findings.
Revised:  Though researchers have long assumed water on Mars had all evaporated into the Martian atmosphere . A 1991 hypothesis, then considered outrageous , stating Mars has known flooding in recent times , is now supported by the findings.
Edit intent: fluency
Original:  Though researchers have long assumed water on Mars had all evaporated into the Martian atmosphere , a 1991 hypothesis, then considered outrageous , stating Mars has known flooding in recent times , is now supported by the findings.
Revised:  Though researchers have long assumed water on Mars had all evaporated into the Martian atmosphere , a 1991 hypothesis, then considered outrageous by suggesting Mars was no stranger to floods , is now supported by the findings.
Edit intent: clarity
Original:  Though researchers have long assumed water on Mars had all evaporated into the Martian atmosphere , a 1991 hypothesis, then considered outrageous , stating Mars has known flooding in recent times , is now supported by the findings.
Revised:  Though researchers have long assumed water on Mars had all evaporated into the Martian atmosphere , a 1991 hypothesis, then considered outrageous , stating Mars has known flooding in recent times , is now supported by recent findings.
Edit intent: clarity
Original:  The HRSC data suggests water is still present as water and ice, above and beneath ground.
Revised:  The HRSC data suggests water is still present in liquid form and ice, above and beneath ground.
Edit intent: clarity
Original:  In February 2005, scientists announced the discovery of bacteria that had survived in a state of frozen suspension for 32,000 years.
Revised:  In February 2005, scientists announced the discovery of bacteria that survived in a state of frozen suspension for 32,000 years.
Edit intent: clarity
Original:  As with Earth  , a sample of the Mars ice should give great insight in the evolution of the Martian environment and atmosphere , and this may be the objective of future Mars research
Revised:  , a sample of the Mars ice should give great insight in the evolution of the Martian environment and atmosphere , and this may be the objective of future Mars research
Edit intent: coherence
Original:  As with Earth  , a sample of the Mars ice should give great insight in the evolution of the Martian environment and atmosphere , and this may be the objective of future Mars research
Revised:  As with Earth , a sample of ice could offer great insight into the evolution of the Martian environment and atmosphere , and this may be the objective of future Mars research
Edit intent: clarity
Original:  As with Earth  , a sample of the Mars ice should give great insight in the evolution of the Martian environment and atmosphere , and this may be the objective of future Mars research
Revised:  As with Earth , a sample of the Mars ice should give great insight in the evolution of the Martian environment and atmosphere . This may a great chance to get objective evidence for Mars research
Edit intent: coherence
Original:  They found evidence that glaciers moved from the poles to the equator between 3.5 and 4 million years ago, suggesting that Mars is currently in an w:Interglacial period|interglacial period .
Revised:  They found evidence that glaciers moved from the poles to the equator between 3.5 and 4 million years ago, suggesting that Mars is currently in an interglacial period .
Edit intent: clarity