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Rare California frogs of Mark Twain fame may be making a comeback

World's largest dinosaur footprint shows just how enormous these beasts were

Do cookbooks neglect food safety?

Tasmanian tiger 'sightings' prompt new scientific hunt

Cats are subtle, but they really do love us!

Rare Florida panther kittens spotted outside known breeding range

Do women need time off during menstruation?

In baby otter's first try, water is no fun

Planes, trains and automobiles: How noisy is transportation where you live?

The old and the young need safer streets

How to redesign a van to live out of it

7 sickly kids who grew up to change our world