With more than 18 months of the pandemic in the rearview mirror, researchers have been steadily gathering new and important insights into the effects of COVID-19 on the body and brain.
Look up at the sky on a clear night, and you'll see thousands of stars - about 6,000 or so. But that's only a tiny fraction of all the stars out there.
September marks the end of the summer sea ice melt season and the Arctic sea ice minimum, when sea ice over the Northern Hemisphere ocean reaches its lowest extent of the year.
The ancient Greeks proved over 2,000 years ago that the Earth was round and figured out how big it was by using simple observations of the Sun.
Would it really be possible to get the DNA of dinosaurs and then recreate them?
Surrounding Earth is a powerful magnetic field created by swirling liquid iron in the planet's core. Earth's magnetic field may be nearly as old as the Earth itself - and stands in stark contrast to the Moon, which completely lacks a magnetic field today.
Scientists can make some pretty accurate forecasts about the future. But predicting what the Earth will be like 500 years from now is a difficult task.
Gravity is the reason things with mass or energy are attracted to each other.
Long before the current political divide over climate change, and even before the U.S. Civil War (1861-1865), an American scientist named Eunice Foote documented the underlying cause of today's climate change crisis.
There is now evidence that demonstrates the existence of "exoplanets" - that is, planets orbiting stars other than our Sun.