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Why we have a leap second today

Ultrarunner tries to break Appalachian Trail record

'Luminosity' peeks inside the brilliant world of New Zealand's famous glowworms

Boris plugs in London's double-deckers

Travel company will strand you on a desert island

Watch a raccoon teach her cub to climb a tree

6 scientists who play dress-up for animals

When common chemicals are combined, does your risk of cancer go up?

Where can you find the best ice cream in the U.S.?

A daily weigh-in may help you lose weight

New bill would bring military dogs back home

Are skinny jeans a health hazard?