Lift the transparency film with the top ruler and water drop about 1.3 centimeters up and do your best to measure the length of a millimeter indication of the bottom ruler, as seen through the ...

Is it not the fact that sunshine causes a kind of “greasiness” which makes drops of water roll up when in contact with glass instead of spreading uniformly over the surface? I have frequently ...

No shortage of clever iPhone camera hacks exist, but Scientific American found out that adding a drop of water on the lens of the camera creates a free magnifying glass and some cool effects. The ...