We found mineral grains that are considered very high-temperature minerals -- they normally form under extremely high temperature conditions. And yet they were collected in a comet, the Siberia of the solar system.  -   Don Brownlee     Quotes
We found mineral grains that are considered very high-temperature minerals -- they normally form under extremely high temperature conditions. And yet they were collected in a comet, the Siberia of the solar system. Don Brownlee