Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Some things you can see directly, like your fingers. Other things, like your chin, you need a mirror or a camera to see.

The simulation hypothesis is an impressive logical and philosophical argument that has challenged our fundamental notions of reality.

The idea that reality might be a kind of cosmic software has shifted from late-night dorm debate to a live question in ...

Elon Musk and others find it plausible that our experiences result from events in a computer simulation, just like the characters in the Matrix movies. An alternative view, supported by both common ...