Ancient Jordanian town destroyed by a meteor blast may have inspired Biblical stories, scientists say; Animals are shapeshifting in response to climate warming, and it could be costing them; Tiny flying microchips inspired by maple seeds could help monitor the environment; An inside scoop on how COVID vaccines are being tested on kids; Widespread vaccination should mean the impact of COVID variants ‘will be blunted’; What are the relative sources of light on a moonless night?