April 24, 2019, 9:24 a.m.
This impressive lineup includes birds, fish and even snakes.
April 23, 2019, 3:07 p.m.
Every June, the Elkmont Ghost Town in Great Smoky Mountains National Park lights up with the world's largest gathering of synchronous fireflies.
April 23, 2019, 1:45 p.m.
These aerial images highlight the devastating effect global warming has on the arctic.