Megan ByrneLow Temps Killed The Rodents
October 18th 2006 04:37
Rodent fossils from central Spain have shown that there was a small rodent extintion every 2.5 million years of the Earth's history. In addition, the rodent population has had a considerable decrease in population about every million years.
In a study at Ultrecht University in the Netherlands, researchers charted the fluctuations in the Spanish rodent population over a period of from 2.5 million to 24.5 million years ago. About 14 million years ago, Spanish rodents were bordering on extinction.
At the same time, the earth was in a circular orbit, resulting in a cooler climate less conducive to the rodents.
There have apparently always been variations in the Earth's orbit and those variations determine the climate of the Earth. If the tilt of the poles in relation to the sun changes, sunlight available to different hemispheres will change, resulting in the alteration in temperature.
When the Spanish rodents were struggling, temperatures were cooler than average because of the more circular orbit of Earth, challenging their survival and proving that variations in orbit correlate to and have an impact on life.
In a study at Ultrecht University in the Netherlands, researchers charted the fluctuations in the Spanish rodent population over a period of from 2.5 million to 24.5 million years ago. About 14 million years ago, Spanish rodents were bordering on extinction.
At the same time, the earth was in a circular orbit, resulting in a cooler climate less conducive to the rodents.
There have apparently always been variations in the Earth's orbit and those variations determine the climate of the Earth. If the tilt of the poles in relation to the sun changes, sunlight available to different hemispheres will change, resulting in the alteration in temperature.
When the Spanish rodents were struggling, temperatures were cooler than average because of the more circular orbit of Earth, challenging their survival and proving that variations in orbit correlate to and have an impact on life.
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