Earth Matters

Baby humpback whales whisper to their mothers, new recordings reveal

15 astounding facts about trees

2.4 billion-year-old fungus could rewrite our evolutionary heritage

First bison calf born in Banff National Park in 140 years

NASA is growing Martian gardens to prepare for life on Mars

11 of the most endangered trees in America

Can artificial insemination save the Mexican wolf from extinction?

Obama's national monuments are a big deal

8 species on life support

Why are fireflies disappearing?

5 surprising facts about roadrunners

Striking mother-of-pearl clouds may have inspired 'The Scream'

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