One of the most elegant theories about the origins of life on our planet is that it was kick-started by a delivery from outer ...
The universe is about 14 billion years old, while Earth is estimated to be about 4.6 billion years old. Homo sapiens evolved about 600,000 years ago. Have students calculate the length of a time line ...
Smithsonian Magazine on MSN
A Planet Slammed Into Earth 4.5 Billion Years Ago, Forming the Moon. The Projectile May Have Been Our Neighbor
Around 4.5 billion years ago, a planet called Theia is thought to have smashed into newborn Earth. The messy collision kicked ...
Discover Magazine on MSN
Earth and the Mysterious Planet Theia Were Likely Close Neighbors Before the Moon Formed
Discover how scientists have used iron isotopes to determine the likely origin of the Mars-sized planet named Theia.
Depending on the time of year you collect, you might find pollen grains, mineral flakes (such as quartz, mica, or feldspar), or insect parts in your particulate matter. Although they are more rare, ...
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