Here’s a wonderful word to add to your vocabulary: Micrometeorites.
Micrometeorites are teeny particles, less than a millimeter in size, that made it through Earth’s atmosphere from space. They are extraterrestrial, cosmic dust, star stuff—or, more precisely, asteroid stuff. As they speed through the atmosphere, micrometeorites melt to form spherical drops, and when they land on Earth, they cool and form dendritic crystals that branch from their surface like trees.
Scientists usually collect cosmic dust in the frozen wastes of Antarctica. Now, for the first time, the space debris has been found hidden in city dirt.
Researchers from Imperial College London report that the white cliffs of Dover contain the fossilised remains of cosmic dust.
Cosmic dust is exactly what it sounds like — dust in outer space. Most particles are tiny, between a few molecules to 0.1 micrometres in size. Sometimes, they make it through the Earth's atmosphere in one piece, revealing some myste...
Each year, more than 3,000 tons of space dust fails to burn up in our planet's atmosphere and falls instead to Earth's surface. These micrometeorites are just a few microns in diameter, but scientists say that embedded in the fossil...