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At biggest biosphere in N. America, humans live in harmony with nature

Why invasive plants love climate change

The 14 most amazing waterfalls in the world

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

David Attenborough 'coming to terms' with memory loss (but no, he's not retiring)

Book sheds new light on the hermit who shunned humanity for 27 years

Lyrid meteor shower to peak on Earth Day

13 amazing things animals can do with their bodies