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This is a science video about Conduction of Heat for Grade 6-7 students. It demonstrates the transfer of heat with an activity and explains the conditions required for conduction of heat.

National Geographic Channel is taking viewers around the world-literally-in this spectacular two-hour television event broadcasting LIVE from the International Space Station (ISS) and Mission Control in Houston, Texas. Made in collaboration with NASA, we'll go into orbit with astronauts Rick Mastracchio and Koichi Wakata as they fly at 17,500 mph nearly 250 miles above the earth's surface on the International Space Station, while astronaut Mike Massimino joins host Soledad O'Brien on the ground at Mission Control in Houston. From space, Mastracchio and Wakata will give viewers a fully guided tour, showing us how they live for months in microgravity. They'll conduct never-before-broadcast experiments that demonstrate the real-world value of the science conducted on the floating laboratory. Plus get ready for stunning shots of Earth, from sunset and sunrise, to city lights and green aurora, to lightning storms and shooting stars. You've never seen our planet like this before.

This NASA documentary celebrates 50 years of extravehicular activity (EVA) or spacewalks that began with the first two EVAs conducted by Russian Alexey Leonov in March 1965 and American astronaut Edward White in June 1965 . The documentary features interviews with NASA Administrator and astronaut, Charles Bolden, NASA Deputy Administrator and spacesuit designer, Dava Newman, as well as other astronauts, engineers, technicians, managers and luminaries of spacewalk history. They share their personal stories and thoughts that cover the full EVA experience-- from the early spacewalking experiences, to spacesuit manufacturing, to modern day spacewalks aboard the International Space Station as well as what the future holds for humans working on a tether in space. "Suit Up," is narrated by actor and fan of space exploration Jon Cryer. Cryer recently traveled to Star City, NASA Headquarters and the Johnson Space Center to film an upcoming Travel Channel documentary series.

Kelly and astronaut Terry Virts discussed those things and more in one of at least four video chats TIME will conduct with the ISS during our exclusive Year in Space coverage. Phoning the station is not easy. It takes days of planning and at least an hour of sound checks before the uplink is made, and then long delays as questions and answers are relayed back and forth. It makes ordinary conversation a challenge.

Still, even in the 14 minutes the connection lasted-during which the station passed over Canada, the Great Lakes, Minneapolis, Denver, and Southern California-Kelly and Virts were surprisingly open, sharing their feelings about both the camaraderie and the sublime loneliness of being where they are. Kelly especially must be mindful of those feelings as he faces 10 more months of circling the Earth, while his family and friends and everything he knows lie 250 miles below him.

The first six weeks of Scott Kelly's marathon year aboard the International Space Station (ISS) haven't been easy. There was the reacclimation to zero-gravity, the failure of a Russian cargo ship carrying needed supplies, the cancellation of singer Sarah Brightman's planned visit-to say nothing of the constant, minute-by-minute work schedule that is the stuff of any day aboard the station.

Kelly and astronaut Terry Virts discussed those things and more in one of at least four video chats TIME will conduct with the ISS during our exclusive Year in Space coverage.

Find out why NASA astronaut Dr. Mae Jemison wanted to go into space in this profile from NOVA's The Secret Life of Scientists and Engineers.

A physician, a chemical engineer, a teacher, a dancer, and the first African American woman astronaut to go to space, Dr. Jemison launched into orbit on September 12, 1992 as a STS-47 Mission Specialist for Space Shuttle Endeavor. During the eight day mission, she and the STS-47 crew conducted 44 life science and materials processing experiments.