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Hot Topic
Origins
Origin & Evolution of Life
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| The Oldest Life on Land |
| Topic: Origin & Evolution of Life |
06/02/02 |
| Fossilized remnants of a microbial mat provide evidence that life existed on land as early as 2.6 to 2.7 billion years ago. The findings suggest that an oxygen atmosphere and a protective ozone layer were in place around Earth by that time. |
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| Test-tube RNA |
| Topic: Origin & Evolution of Life |
06/02/02 |
| Research done by scientists at the Whitehead Institute for Biomedical Research offers insights into evolutionary origins of life. |
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| The Three Domains of Life |
| Topic: Origin & Evolution of Life |
06/02/02 |
| When scientists first started to classify life, everything was designated as either an animal or a plant. But as new forms of life were discovered, the original classification was not sufficient enough to organize the diversity and complexity of life. |
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| Genomics Meets Geology |
| Topic: Origin & Evolution of Life |
06/02/02 |
| Chemist Steven A. Benner and his colleagues are combining chemistry and geological history in an approach to understand life on Earth. |
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| Clues to the Last Common Ancestor |
| Topic: Origin & Evolution of Life |
02/25/02 |
| Molecular detectives have traced human ancestry back to the so-called Mitochondrial Eve, the last female common ancestor. More recent research has posited a Y-chromosome Adam, the last male common ancestor. |
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| Genetic Alchemy: Turning Lobsters into Fruit Flies |
| Topic: Origin & Evolution of Life |
02/22/02 |
| Biologists at the University of California, San Diego, now have genetic evidence that explains how such drastic alterations to body plans were able to occur during the early evolution of animals. |
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| Life's Baby Steps |
| Topic: Origin & Evolution of Life |
05/09/01 |
| Billions of years ago, amino acids somehow linked together to form chainlike molecules. Now scientists have discovered what may be a key step in this process - a step that has baffled researchers for more than a half a century. |
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| Evo Devo Learns a Larval Lesson |
| Topic: Origin & Evolution of Life |
03/21/01 |
| Scientists have studied the life history of animals, part of a field called development, for many decades. Other scientists have studied how life arose and evolved on Earth. |
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| TNA World |
| Topic: Origin & Evolution of Life |
03/12/01 |
| DNA is the building block for life on Earth. But it is a highly complex molecule, and could not have arranged itself spontaneously. What did it develop from? Astrobiologists examine possible ancestors of DNA: nucleic acids called PNA, p-RNA, and TNA. |
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