Article: US researchers have found traces of an ancient lake on Mars recently, increasing hopes of discovering evidence that billions of years ago the Red planet hosted life. The lake, which dates back some 3.4 billion years, appears to have covered as much as 80 square miles and was up to 1,500 feet deep, said the team from the University of Colorado. "This is the first clear evidence of shorelines on the surface of Mars," said Boulder's research associate, Gaetano Di Achille, in a study published in the latest edition of Geophysical Research Letters. "The identification of the shorelines and accompanying geological evidence allows us to calculate the size and volume of the lake, which appears to have formed about 3.4 billion years ago."[:] Analysis of the images has shown the water carved out the canyon in which it was found, which then opened out into a valley depositing sediment which formed a delta . "Finding shorelines is a great discovery to us," said assistant professor Brian Hynek, adding it showed the lake existed at a time when Mars was thought to have been cold and dry. Scientists believe the oldest surfaces on Mars formed during the wet and warm era known as the Noachan epoch, about 4.1 billion to 3.7 billion years ago. The newly discovered lake is believed to date from the Hesperian era and postdates the end of the warm and wet period on Mars by 300 million years, according to the study. Scientists believe deltas next to the lake may well hold secrets about past life on Mars as such places on Earth have become the natural deposits of organic carbon and other markers of life. Question: The size of the lake found on mars is _ . Yes or no, is the answer "80 square miles"?
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Article: Americans have always been hungry for the holidays. After all, a big Thanksgiving feast is one of our country's oldest traditions, older than America itself. Thankfully, the spirit behind Thanksgiving has never changed, either. It has always been a special time to be thankful for the blessings of the past year. The feast that has become known as the First Thanksgiving was actually a harvest festival celebrated in December of 1621. That's when English settlers in Plymouth, Massachusetts, gave thanks for the progress they had made after a harsh winter in their new country. Guests at outdoor tables gobbled up ducks, geese turkeys, clams, eels, fish, wild plums, corn bread and other goodies. About 90 Native Americans also came and brought five deer to add to the feast. The festival lasted for three days. Thanksgiving customs spread and expanded along with the rest of America. After the American Revolution, George Washington proclaimed that the first national Thanksgiving would be on November 26, 1789. In the decades to follow, however, people celebrate Thanksgiving locally and with no official date. A women's magazine editor named Sarah Josepha Hale wanted to change this. After years of trying hard to get support, she finally persuaded President Abraham Lincoln to proclaim the last Thursday in November 1863 as a national day of Thanksgiving. It stayed that way for 75 years afterward until 1939, when President Franklin D. Roosevelt set it one week earlier. He wanted to lengthen the shopping period before Christmas to encourage gift-buyers and help businesses. So Congress ruled that, after 1941, Thanksgiving would be an official federal holiday falling each year on the fourth Thursday of November. This year we celebrated Thanksgiving on Thursday, November 26. Question: What can we NOT learn from the passage? Yes or no, is the answer "Americans will have three days off on Thanksgiving Day."?
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Q: Article: Werewolves aren't the only creatures affected by the moon's cycles . A full moon also affects people's sleep more or less, reports a Swiss team of scientists. Even people who sleep in a lab without windows could reduce their sleeping time a little once a month. To test the moon's influence, 33 adults of both sexes and ages of many kinds spent several nights in a sleep lab. As they slept, researchers recorded their brain activity, eye movements and hormone levels . On nights closer to a full moon, the sleepers took an average of five minutes longer to fall asleep, and slept for 20 minutes less. In addition, brain activity fell by 30 percent during the sleep. And hormone levels that help control sleep cycles went down. On these nights, the sleepers complained they couldn't sleep well even though they didn't know the moon's cycle. On the bright side, no sleeper turned into a werewolf. The Swiss team doesn't know how the moon affects sleep. The gravity of the moon causes ocean tides to rise and fall. But that force is too weak to affect sleep, Gajochen says. He believed some body's biological clock may be affected by the moon cycles. There may be another reason, says David Dinges. This sleep researcher at the University Of Pennsylvania in Philadelphia says that the body clock is very sensitive to light at night. Those sleepers could have been affected by having too much moonlight before arriving at the lab. Question: The passage is mainly about _ . Yes or no, is the answer "the moon's influence on sleeping and its possible reasons"?
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Article: People aren't walking any more---if they can figure out a way to avoid it.. I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn't in any hurry, either. I had merely become one more victim of a national sickness: motorosis. It is an illness to which I had thought myself immune, for I was bred in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day's walk and the ability to cover such a distance in ten hours as sign of strength and skill. It did not occur to us that walking was a hardship. And the effect was lasting. When I was 45 years old I raced -and beat--a teenage football player the 168 steps up the Stature of Liberty. Such enterprises today are regarded by many middle-aged persons as bad for the heart. But a well-known British physician, Sir Adolphe Abrahams, pointed out recently that hearts and bodies need proper exercise. A person who avoids exercise is more likely to have illnesses than one who exercises regularly. And walking is an ideal form of exercise--- the most familiar and natural of all. It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world. He cannot learn in a car. The car is a convenient means of transport, but we have made it our way of life. Many people don't dare to approach Nature any more; to them the world they were born to enjoy is all threat. To them security is _ r thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green. I say that the green of forests is the mind's best light. And none but the man on foot can evaluate what is basic and everlasting. Question: What was life like when the author was young? Yes or no, is the answer "People usually went around on foot."?
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