-advertisement-
10%

Can you complete the following sentence? Laika was the first_____in space.

Fact Lab

-advertisement-

Interesting fact:

Here's a cool experiment: All you need is a wine glass. Then just damp your finger and slightly run it over its rim. Your wine glass will sing! If you vary the amount of water in the glass, the frequency will change, and the sound will change pitch. You can even play an entire tune!