Subscribers: LOG IN to access quizzes, worksheets, and more! Not a subscriber? SUBSCRIBE!
TFK Family Edition
Get the monthly edition for tablets
Scientists in the Utah desert are trying to find out if humans would be able to survive on Mars. For two weeks, the researchers have limited amounts of oxygen, water, food and...
View photos from the effects of a a 10-ton meteor that exploded several miles over Russia on February 15
Scientists in China wear panda costumes as a disguise when approaching endangered giant pandas. View a slide show to see them in action.
See how wildlife photographer Suzi Eszterhas captures images of beautiful, mysterious and—sometimes—dangerous animals
© 2013 Time Inc. All Rights Reserved.