This is your chance to meet the What If team! Which challenge should Peter do next? The best comment will have a Zoom meeting with us and get a chance to ask any questions and learn more about our ...

Is there an Outer SpaceX? With 3I/ATLAS set to fly by Earth in just over a week, experts continue to speculate over its origins. Harvard Scientist Avi Loeb believes that if aliens, the comet wouldn’t ...