Iron screws and other so-called ferromagnetic materials are made up of atoms with electrons that act like little magnets. Normally,…
Read More »triggered
Scientists studying rocks in South Africa report evidence for the earliest known earthquake triggered by plate tectonics. The temblor struck more…
Read More »Warming oceans could lead to the mass die-off of tropical coral reefs Helmut Corneli / Alamy The climate has warmed…
Read More »