Earth Matters

Cheetah cubs born through IVF offer hope for their species

The power is coming back on in Australian communities thanks to solar-powered minigrids

Swirling seals win top underwater photography honors

Jimmy Carter's solar farm now powers more than half of his hometown

Why are fireflies disappearing?

This African-American female scientist helped launch the space race

46,000-year-old frozen bird uncovered in Siberia

Some birds watch other birds to see if what they're eating is good ... or gross

What is the 'windshield phenomenon'?

Bear the dog is saving Australia's koalas — and he needs your help

Why Iran's Lake Urmia disappeared — and may be coming back

Thousands of feral horses to be removed from national park after Australian wildfires

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