KRWG Online The Science Digest - asteroid's perfect timing KRWG | By Vince Gutschick Published November 3, 2020 at 8:45 AM MST Facebook Twitter LinkedIn Email Listen • 1:30 www.nasa.gov Thank your lucky….asteroids??? In this week’s Science Digest, Vince Gutschick explains how an asteroid’s perfect timing helped set the stage for humans on Earth.