Atlas Obscura on Instagram: "Imagine watching the Northern Lights and hearing them crackle, hiss, or sizzle. Arctic communities have reported it for centuries, but scientists have said it was impossible. Now, new research reveals those mysterious sounds may be real, and much closer to us than we thought. For more on this, visit Untold Earth's episode "There's Something Weird Going on with the Northern Lights" on PBS Terra. 🌏 This series is made in partnership with @pbsnature."

Terra Australis on Instagram: "We had this guy follow us for a little while on a recent shoot. Incredible to be able to document their natural behavior. 🙌 Wait to the end to see how quickly he can accelerate. 🦈👍 Epic"