Henry Cavendish
Description: Henry Cavendish was the first scientist to test gravity in the laboratory. Thanks to the "Cavendish Experiment," we know how much Earth weighs!
Category: Janet's Planet
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Game Spotlight
Mega Tic Tac Toe takes the classic game of x's and o's and supersizes it! You can choose to play the classic 3 x 3 tic tac toe, or play a custom game using a board size from 3 x 3 to 8 x 8. You can even select the number in a row needed to win. Play against a computer or play in 2 player mode against a friend.