Science of Sandcastles

Sandcastles can be an art form, but there actually is a lot of science behind them. When making a sand mixture, it must be (by volume) 99% dry sand, 1% water. If you add much more water than that, you’ll be in danger of creating landslides. Essentially, you want just enough water so that capillary bridges hold the grains of sand together.

How well does this work? The researchers were able to make a cylinder 7 centimeters in diameter that stood 60 centimeters high!

More info: http://bit.ly/19DSu5g