Marine oil spills are usually measured by the amount of oil floating on the surface. But the BP spill in the Gulf of Mexico, from a deep-sea well, required a different approach. Find out how one fluid-dynamics expert caused estimates to rise sharply practically overnight.
New, sped-up video of an emperor penguin huddle in Antarctica shows the group takes small steps, creating a wave. Researchers say the undulations ensure each penguin a turn in the middle of the cluster, which helps the birds keep warm.
Animals, adventure, geography, culture - The National Geographic Kids Almanac has it all. You'll find puzzles, games, homework help, quirky factoids, amazing photographs, and more inside this affordable, 352-page essential.
Stunning courage and matchless skill with a camera are the twin hallmarks of Alexandra Avakian's fascinating career as a photojournalist. Here, she weaves stories from her two decades traveling the globe to document the culture of the Muslim world.
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