Hidden store of manganese may have helped Earth get its oxygen
Computer simulations have uncovered a new manganese compound that could exist deep in Earth’s mantle and may be connected to the process that gave our atmosph...
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A lost continent lies in pieces beneath southern Europe. Geologists call it Greater Adria: a Greenland-sized landmass that was crushed under Europe, leaving its scraped-off remains scattered through t
A lost continent lies in pieces beneath southern Europe. Geologists call it Greater Adria: a landmass roughly the size of Greenland that broke off the supercont...
Onyx Stone Isn't Always Black
Onyx stone is a semiprecious natural stone known for smooth bands, glossy polish and dramatic color. Most people picture black onyx first, but onyx appears in a...
Earth's magnetic field has flipped hundreds of times, swapping magnetic north and south in a switch locked into ancient rock, and it happens on no fixed schedule, yet nothing in the record suggests a
Magnetic reversals are real and common over geological time, but they do not run on a neat schedule. The switch is recorded in rock, and the fossil record shows...
Between five and six million years ago, the Mediterranean Sea nearly dried out — and when Atlantic water finally broke back in near Gibraltar, one model suggests the basin may have refilled so violent
Between roughly 5.97 and 5.33 million years ago, the Mediterranean Sea was cut off from the Atlantic and lost most of its water to evaporation. The event is cal...
Azurite: An Electric-Blue Mineral That Gets Its Shine From Copper
Azurite is a copper carbonate mineral famous for a deep blue color that can look almost electric in fresh crystals. It is also a clue: where azurite shows up in...
Scientists Took a Look Inside Earth’s Core—and Made a Surprising Discovery
No one knows why the river of liquid iron flowing 1,400 miles beneath our feet just reversed course.
Difference Between Marble and Limestone: Rock Type, Formation, Hardness, Appearance, and Common uses
Marble and limestone are closely related rocks. They share the same primary mineral (calcite, calcium carbonate) and they’re often confused, especially in cou...
Scientists Uncover Hidden Rare Earth Treasure Map Beneath Ancient Continents
Scientists have identified a hidden deep-Earth pattern that may reveal where rare earth deposits form.