People in northern Siberia saw a fireball streak through the sky on Tuesday as a small asteroid entered Earth's atmosphere and plummeted toward the planet's crust. Though it's unclear whether ...

During this time, Earth experienced summers that were almost completely ice-free and there was significant vegetation growth in polar regions, changing the ecosystems for life to flourish.

A microscopic multi-celled organism has returned to life after being frozen for 24,000 years in Siberia, according to new research. Scientists dug up the animal known as a bdelloid rotifer from ...