Early Meteorite Bits Reveal Clues About Solar System’s Evolution

From livescience.com (please note that as this is a post I am sharing from elsewhere rather than one of my own comments are closed)

By sifting through minuscule remnants of ancient solar-system crashes, called micrometeorites, researchers found that the most common types of meteorites today used to be quite rare — and the rarest ones used to be common.

Source: Early Meteorite Bits Reveal Clues About Solar System’s Evolution

Lights Out: Asteroid Triggered Freezing Darkness That Killed Dinos

An excellent piece about the extinction of the dinosaurs (except the feathered variety that we now call birds)…

It was the airborne sulfate molecules that led to the years of darkness and cold 66 million years ago after the asteroid slammed into Earth.

Source: Lights Out: Asteroid Triggered Freezing Darkness That Killed Dinos