A new computer modeling study shows that – some 4 billion years ago – a barrage of incoming debris from space likely formed what we know today as Earth’s oldest rocks.
Artist's concept of the period in Earth's early history, about 4 billion years ago, when meteorites bombarded our world. Image via Paleoblog
One of the prettiest stories in all skylore surrounds this star. “On the 7th night of the 7th moon …” The legend sets the date of Chinese Valentine’s Day – the Qixi Festival – this year on August 17.
Red tides and a blue-green algae outbreak are fouling hundreds of miles of coast, killing fish and driving tourists from beaches. Some causes are natural, but human actions also play a role.
Algae cover the surface of the Caloosahatchee River at the W.P. Franklin Lock and Dam, July 12, 2018, in Alva, Florida. Photo via
This free-floating rogue planet – untethered to any star – has a magnetic field millions of times more powerful than Earth’s and auroras much more brilliant than our world’s northern lights.
Artist’s concept of rogue planet SIMP J01365663+0933473. The free-floating planet has a magnetic field millions of times more powerful than Earth’s and intense auroras. Image via Caltech/Chuck Carter/NRAO/AUI/NSF.