Saving the ozone helped climate change, extra-solar comet, great auk extinction, rockets for Mars, concussions and brain hemispheres and a question of cloud cover
When we saved the ozone layer we saved ourselves from even worse climate change; An interstellar visitor could be lighting up for astronomers in time for the holidays; Penguin-like great auk extinction has human signature all over it; NASA, SpaceX, a former astronaut: Who will build the rocket that takes us to Mars?; Concussions can damage the connection that helps your left brain talk to the right; As water covers most of the Earth, why isn’t it completely shrouded in clouds?