A new study on how comets evolve reveals that deep space objects may be time capsules containing ancient ices from billions of years ago.

Agriculture in Syria started with a bang as a fragmented comet slammed into the Earth's atmosphere over Abu Hureyra, say researchers.

Heat from a comet exploding just above the ground in what is now the Atacama Desert in Chile fused sandy soil into patches of glass around 12,000 yeas ago.

"...there could be anywhere from a few hundred to hundreds of thousands of these alien comets orbiting the sun."

A blue asteroid that sometimes acts like it's a comet has scientists scratching their heads, but new research digs into its potential origins.