National Geographic How You Can Participate in Earth Day 2018-04-21T15:20:00.000000000+00:00 From grassroots to global, these initiatives aim to counter our most pressing environmental issues. 5 Times People Used Trees to Change the World 2018-04-21T15:19:00.000000000+00:00 These people have used trees to fight climate change, help with diplomacy, and save their island. How the Environment Has Changed Since the First Earth Day 2018-04-21T15:00:00.000000000+00:00 When the first Earth Day was held in 1970, pesticides were killing bald eagles, and soot was darkening the sky. Now, habitat loss and climate change are imperiling the planet. This Storm Chaser Risked It All for Tornado Research 2018-04-21T04:01:00.000000000+00:00 Tim Samaras always wanted to be a storm chaser and he was one of the best. But then he encountered the deadly El Reno tornado of 2013. This Beetle Can Withstand 40 Times More G-Force Than a Fighter Pilot 2018-04-21T04:00:00.000000000+00:00 Click beetles are among nature's many unsung acrobats with clever strategies for escape. Bizarre Squid Seen Alive for First Time 2018-04-20T21:31:12.000000000+00:00 The deep-sea creature, which might be a new species, has marine biologists flummoxed. Deepest Octopus Nursery Discovered, Holds Dark Secret 2018-04-20T21:03:26.000000000+00:00 Submersible footage reveals hundreds of mother octopi brooding their eggs more than a mile deep. These Countries Changed Their Names. Here's How It Worked Out. 2018-04-20T20:15:00.000000000+00:00 Swaziland's change to eSwatini is the latest in a series of shifts in country names around the world. Here's a look back at some of the most famous. Enzyme That Eats Plastic Accidentally Found in Lab 2018-04-20T16:40:30.000000000+00:00 A surprise find may eventually help scientists clean up the glut of plastic pollution around the world. Stench Leads to Home Crawling With Stolen Tortoises—10,000 of Them 2018-04-20T15:24:47.000000000+00:00 A gruesome discovery by authorities in Madagascar highlights a grave threat to a highly endangered species of tortoise.