Copyright 2017 NPR. To see more, visit ARI SHAPIRO, HOST: Every so often on this show we hear a story from Adam Cole, who hosts NPR's science YouTube channel called Skunk Bear. He has told us how to apply to be an astronaut, how to sail around the world in a canoe. He even brought us this moving musical report on the death of a giant Galapagos tortoise. (SOUNDBITE OF SONG, "LONESOME GEORGE") ADAM COLE, BYLINE: (Singing) He was just a giant tortoise, the last one of his kind. SHAPIRO: And a single tear rolls down my cheek, Adam Cole is back here in the studio. Hi, Adam. COLE: Hello, Ari. SHAPIRO: And sadly, you don't actually have a quirky, wonderfully weird science story for us today. Why are you here? COLE: This time I'm actually asking the listeners for questions. We want to know what you want us to investigate next, things you've been wondering about that science can answer. SHAPIRO: This is exactly what you've been doing on your YouTube channel. You answer what you call good