Here’s why icicles made from pure water don’t form ripples. ... But lab-made icicles free from salt disobey a prominent theory of how icicles form, and it wasn’t clear why.

Ripples in the water returned exactly to their start point – the shape of the Eiffel Tower. Déjà vu. To show that the backward-travelling waves converge exactly on their starting point, ...

Author Alex Prud'homme has crafted a tightly written, thoroughly researched, almost encyclopedic book about the state of fresh water in the 21st century, "The Ripple Effect." ...