Latest Stephen Mojzsis Stories
The bombardment of Earth nearly 4 billion years ago by asteroids as large as Kansas would not have had the firepower to extinguish potential early life on the planet and may even have given it a boost.
Carbon dioxide, a greenhouse gas that has become a bane of modern society, may have saved Earth from freezing over early in the planet's history, according to the first detailed laboratory analysis of the world's oldest sedimentary rocks.
Tiny zircon crystals dug up from ancient Australian deposits appear to have been formed right after the birth of the planet -- a finding that suggests that early on, Earth had a cool crust much like today's that could have harbored life, scientists said on Thursday.
A surprising new study by an international team of researchers has concluded Earth's continents most likely were in place soon after the planet was formed, overturning a long-held theory that the early planet was either moon-like or dominated by oceans.
- a slit in a tire to drain away surface water and improve traction.