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Hot Topic
Origins
Origin & Evolution of Life
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Earth's Late Veneer
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| Topic: Origin & Evolution of Life |
05/06/08 |
| New research questions the idea that water and other elements were added to the Earth late in its formation by impacts with icy comets and meteorites. The finding may cause scientists to rethink theories about the origin of life on our planet. |
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You Are What You Eat
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| Topic: Origin & Evolution of Life |
05/02/08 |
| By examining marks on the teeth of ancient human ancestors, scientists have found that their diet was far different than previously believed. The research sheds light on the evolutionary history of complex organisms on Earth. |
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Absolute Argon
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| Topic: Origin & Evolution of Life |
04/29/08 |
| By refining a technique used to date rocks and fossils, scientists have now determined the date of the dinosaurs' extinction with pinpoint accuracy. The finding sheds new light on one of the most dramatic periods in the evolution of life on Earth. |
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The Present is the Key to the Past
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| Topic: Origin & Evolution of Life |
04/21/08 |
| Mike Russell thinks life began in iron sulfide deposits at ocean vents. In this interview, he expands on his theory of how life originated, and explains why "life from space" scenarios are dead wrong. |
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DNA Barcodes
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| Topic: Origin & Evolution of Life |
04/20/08 |
| Researchers are developing a new and rapid way of identifying an organism's species based on DNA. The technology will help in finding new species and will be a valuable tool in understanding and documenting the evolution of life on Earth. |
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Earth's First Animal
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| Topic: Origin & Evolution of Life |
04/13/08 |
| A new study shows that Earth's first animal was probably more complex than previously believed. By analyzing massive volumes of genetic data, scientists have defined the earliest splits at the base of the animal tree of life. |
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Meteorites Made Life Left-Handed
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| Topic: Origin & Evolution of Life |
04/08/08 |
| Scientists have provided evidence that the building blocks of life could have formed from the interactions of desert heat, water and meteorite impacts. The findings may also explain why amino acids used by life are predominantly 'left-handed'. |
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Following the Paper Trail of Ancient Life
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| Topic: Origin & Evolution of Life |
04/02/08 |
| Researchers have found the earliest direct evidence of biological material on Earth in the form of cellulose microfibers. The finding also indicates that cellulose could be an excellent biosignature to search for on other planets. |
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Missing Molybdenum
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| Topic: Origin & Evolution of Life |
03/30/08 |
| Scientists have reconstructed changes in the Earth's ancient ocean chemistry in order to learn more about the connections between the environment of Earth and the evolution of life. |
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How Did Life Get Started?
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| Topic: Origin & Evolution of Life |
03/10/08 |
| How did life get started? A growing body of evidence favors an "RNA World" as an early stage of life, before DNA assumed its present role as the molecule that stores genetic information. |
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