For anyone in the path of totality during a solar eclipse, the moon is seen to block out the entire sun. But can a swarm of locusts, such as the desert locust (Schistocerca gregaria) at right, do the same? (Note: images not to scale.) (Photo credits: Luc Viatour, CC BY-SA 3.0; Micha L. Rieser, via Wikimedia Commons)