Tiny impacts on the moon's surface release up to 220 tons of water a year, NASA data suggest https://t.co/k8PxcVar2w

America’s state parks may keep a lower profile than the renowned national parks, but that doesn’t mean they’re any less of a worthwhile destination https://t.co/9MEEAHZyFe

Dredging sand to meet the demands of a global building boom wreaks havoc on sensitive river systems around the world https://t.co/5c7gz8y3BD

For a species to gain protection, experts must first classify its risk of extinction—and it's often a complicated process https://t.co/84PxGvazgm

She hunts food for her cubs by day and keeps them safe from predators by night—no easy task for a cheetah https://t.co/6HqOIzBb4Z

“We had prepped for the shot hours before it got dark with this finished result in mind. It was a great feeling to see it all come together." https://t.co/2ClmPsGA0k

“The countries that are most responsible for global warming are different from the countries that are bearing the brunt of global warming." https://t.co/SllkZYiSHX

NASA's InSight lander detected the first tremor on the red planet ever recorded—and it almost certainly won't be the last https://t.co/vhx4uyEgf9

Travel the world through the eyes—and lenses—of our Your Shot photographers https://t.co/Lrzegh6jwo

A "jewel of botanical literature in Cuba," this book of detailed botany illustrations was rediscovered after decades of searching https://t.co/66gBA3TK2q

"If you start to feel scared and cautious, it's probably time to quit." https://t.co/lET5J8ZjGy

The endangered Cantor's soft-shell turtle, once destined for dinner plates, is beginning to recover thanks to the help of a Cambodian community https://t.co/GJjSA8kmXu

The growth of the elephant population is only part of the encouraging news from Gorongosa—lions, African buffalo, hippos, and wildebeests are all vastly more numerous now than in 1994 https://t.co/oDt2r236FM

A journalist who has covered Sri Lanka's brutal civil war and fragile peace reflects on the cycle of vengeance—and the chance to re-set a long-fractured country https://t.co/gHWsppubvt

"This cut doesn't just harm Brazil, it harms the world." https://t.co/fNXOpEEyQJ

The Tokyo Olympics are bound to bring increased attention to competition climbing, but some athletes are concerned about how the format will change the sport https://t.co/FNPHZh0UUD

The Whanganui River in New Zealand is a legal person. Can giving the natural world rights save it? https://t.co/aBW3IAw8t9

Hope you enjoyed our little walk/climb/swim through the jungle! Don't miss #HostilePlanet next week when we take a look at the desert https://t.co/yzLSKpeVko

This celestial event is known to deliver bright and impressively fast streaks across Northern hemisphere skies https://t.co/hvx8KXkk31

To collect water, bats must dip their fur in the water—but no one wants to be first #HostilePlanet https://t.co/ZuPfpGLrbL