House of Cards

Bryan Berg is a master card builder. He holds the world’s record for the tallest structure built entirely of playing cards. He’s built houses, stadiums, capitols, and castles. Bryan’s buildings have nothing in them but ordinary playing cards. There’s no glue, tape, or clips. How does he do it? He’s discovered a way to build sturdy structures using a trick from nature.

The secret is cells. Plant cells have stiff walls and fit together tightly. Rows and rows of cells form a grid that helps leaves and stems keep their shape. Bees use the same