Here’s Why Earth Just Had Its Shortest Day on Record

[ad_1] There are 24 hours in a day, right? Well, almost. Though it mostly goes unnoticed, hardly any of our days hit this number exactly. Decade to decade, season to season and even day to day, Earth’s rotation speeds up and slows down, shaving off or adding...

Telltale Tsunami Sounds Could Buy More Warning Time

[ad_1] Editor’s Note (1/18/22): On January 15 the eruption of a volcano near Tonga triggered a far-ranging tsunami. This story about detecting tsunamis created by earthquakes is being republished in light of this event. Buoys operate as today’s state-of-the-art...