What does But Why? train?

But Why? trains causal understanding · completing explanations of how and why everyday things work.

How do I play But Why??

Read the explanation, pick the word that correctly finishes the mechanism, and learn the reason behind a familiar phenomenon each round.

But Why? is one of the games inside the Did You Know? hub. It also stands on its own here, with the hub still able to play it.

Fill the blank in a short how-it-works explanation · understand the everyday mechanisms behind familiar things

But Why? needs JavaScript because each round is generated and checked interactively in the browser.

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