In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Q: Article: An astronomer is making a case for launching pop singer Justin Bieber into suborbital space aboard a private rocket ship. The idea is not to rid the world of the Canadian teenager -- he would come back down to Earth eventually, after all -- but rather to help jump-start the emerging suborbital spaceflight industry. It would generate a lot of public interest, which would help commercial spaceflight pick up some much-needed momentum, said Seth Shostak, senior astronomer at the Search for Extraterrestrial Intelligence (SETI) Institute in Mountain View, California. "If there's more interest, there are more customers. If there are more customers, there's more technical development. It's a positive feedback loop, and obviously that's good." Such missions would return to Earth without completing a full lap around the planet. Instead, the flights would hit the edge of space about 62 miles (100 kilometers) above Earth, experience a few minutes of weightlessness, then re-enter the atmosphere and land back at a spaceport. None of these firms are ready to fly customers yet, but some are getting close. For instance, Virgin Galactic hopes to begin powered test flights of its SpaceShipTwo vehicle later this year, with commercial operations perhaps beginning in 2013 or 2014. It is SpaceShipTwo that reportedly grabbed the attention of Beyonce and Jay-Z. Virgin Galactic has collected deposits from nearly 500 customers willing to pay $200,000 for a ride aboard SpaceShipTwo, and both Virgin and XCOR have inked deals to fly scientists and their experiments on research flights. So a suborbital market already exists -- but Shostak is thinking about ways to make it grow. A celebrity launch isn't Shostak's only idea. Suborbital firms should also promote their activities aggressively via social media, Shostak said, and they should make sure their spaceships are bristling with cameras both inside and out, to give the public dramatic views of every mission. Some observers view commercial suborbital spaceflight as a potentially transformative industry, saying it could serve as a stepping stone to the exploration and exploitation of space on an unprecedented scale. While the industry's success is far from assured, Shostak offered some reason for optimism: The American public remains keen on space.
Answer: To arouse the American public's interest.

A: Why may Justin Bieber be sent into suborbital space?
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Q: Article: A new study revealed that the formation of the Earth, Sun and Moon that cause changes in Earth's tides can also trigger a special kind of Earthquake along the California's San Andreas Fault . The study, published in the journal Proceedings of the National Academy of Science,is based on previous researcher suggesting that the gravitational tug of sun and moon is not only affecting the sea levels of Earth, but can also stretch and compress that Earth's crust, producing tremors and quakes. Furthermore, the new study showed that small tremors deep underground were more likely to occur during certain periods of the tidal cycle. For the study, the researchers looked at about 81,000 low-frequency earthquakes from 2008 to 2015 along the Parkfield section of the San Andreas Fault and compared it to the two-week tidal cycle known as the "fortnightly tide," Low-frequency earthquakes are named due to the rumbling sound they make and not by the rate of its occurrence. These kinds of earthquake only occur about 15 to 30 kilometers below ground and are no larger than magnitude 1 in the Richter scale. The researchers discovered that low-frequency earthquakes tend to occur during the waxing period of the tidal cycle, when the tides are getting little by little. It is already known that the strongest Earth tides occur when the sun and moon are in a straight line, while the tide is at its weakest state when the sun and moon are 90 degrees apart. According to the researchers, low-frequency earthquakes show that some part of the San Andreas Fault is creeping, or slowly moving, almost all the time. With the help of the tidal forces, low-frequency earthquakes could provide more information about the deeper part of the fault. "They tell us that the fault continues down below where the regular or typical earthquakes stop on the San Andreas, about 10 or 12 km (about 6 to 7 miles)," said David Shelly, a seismologist at USGS and helped write the study, in a statement. "And they tell us a lot of things about that deep part of the fault that we had no idea existed at all before." "It's almost like having a lot of little creep meters embedded in the fault,"Shelly said. "We can use these low-frequency earthquakes as measurements of, at least in a sense, how much slip is happening at each little spot on the deep part of the fault where we see these events. When we don't see them, we don't know what's happening; we don't know whether it,s slipping silently or not slipping at all." The information is incredibly useful, he added. Whenever the deep part of the fault slips, the stress gets transferred to the shallow part of the fault. "So if all of a sudden, we saw that the deep part of the fault was slipping a huge amount, it might be an indication that there was an increased chance of having an earthquake come at the shallower part of the fault" he said.
Answer: The movement of creeping in the deep part of the San Andres Fault.

A: What causes tremors and quakes according to the passage?
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Q: Article: Helen Thayer, one of the greatest explorers of the 20th century, loves challenges. She says,"I like to see what's on the other side of the hill." She has gone almost everywhere to do that. In 1988,at the age of 50,she became the first woman to travel alone to the North Pole. She pulled her own sled piled with 160 pounds of supplies,and during her trip no one brought her fresh supplies.Accompanied only by her dog Charlie,she survived cold weather and meetings with polar bears. In fact,Charlie saved her life when one of them attacked her.Near the end of her trip,a forceful wind blew away the majority of her supplies. The last week of the trip,she survived on a handful of nuts and a little water each day. Helen goes to challenging places not only for adventures,but also for education.Before her Arctic journey,she started a website called Adventure Classroom.On the site,she shared her adventures in order to inspire students.She explained,"Although kids often see the world in a negative way,without hope for their future,we work to inspire them to set goals,plan for success and never give up..." Helen grew up in New Zealand.Her parents were athletes and mountain climbers.Following her parents'example,she climbed her first mountain at the age of nine.Later,she climbed the highest mountains in North and South America,the former USSR and New Zealand. In 1996,she took on another challenge--the Sahara Desert.She and her husband,Bill,walked 2,400 miles across it.In 2001,she and Bill travelled on foot from west to east through the Gobi Desert in Mongolia.They hope to travel in mainland China into Sichuan and Tibet to study pandas. Helen plans to continue taking trips.She'll use her explorations,writing,photography and environmental works to create programs for her Adventure Classroom website. She wants to inspire her students to never stop facing challenges.
Answer: For education.

A:
Why does Helen travel to different places worldwide?
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