Carbon Dating From The Skies
Determining the age of relatively recent fossils, those of plants and animals that lived tens of thousands of years ago, is not a guessing game but an exact science. By using carbon dating we can determine their age to within few years. Carbon dating is a…
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Biology
The Egg-citing Egg
How many chicken eggs have you eaten in your life? If it is any gauge, the per capita consumption of eggs by…
Astronomy
X-ray Emissions From Comets
The X-ray emission from comets is produced by high-energy particles, but the high-energy particles come not…
Geology
Plate Tectonics
In geologic terms, a plate is a large, rigid slab of solid rock. The word tectonics comes from the Greek root…
Biology
The Great Permian Extinction
More than 250 million years ago, when the current continents formed a single land mass, known as the Pangea…