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Last updated on April 20, 2014 at 17:20 EDT

Latest Michal Kowalewski Stories

2009-08-19 09:56:14

Research at Virginia Tech has shown that the oldest complex life forms -- living in nutrient-rich oceans more than 540 million years ago "“ likely fed by osmosis.The researchers studied two groups of modular Ediacara organisms, the fern-shaped rangeomorphs and the air mattress-shaped erniettomorphs. These macroscopic organisms, typically several inches in size, absorbed nutrients through their outer membrane, much like modern microscopic bacteria, according to the cover story of the...

2008-08-26 03:00:20

By Huntley, John Warren Yanes, Yurena; Kowalewski, Michal; Castillo, Carolina; Delgado-Huertas, Antonio; Ibanez, Miguel; Alonso, Maria R; Ortiz, Jose E; de Torres, Trinidad Abstract.- The hypothesis of limiting similarity, which postulates that morphologically and/or ecologically similar species will differ enough in shape, size, or other variables to minimize competition, has been controversial among ecologiste and paleoecologists. Many studies have reported the occurrence of limiting...

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2008-01-08 15:55:00

BLACKSBURG, Va. -- Scientists have known for some time that most major groups of complex animals appeared in the fossils record during the Cambrian Explosion, a seemingly rapid evolutionary event that occurred 542 million years ago. Now Virginia Tech paleontologists, using rigorous analytical methods, have identified another explosive evolutionary event that occurred about 33 million years earlier among macroscopic life forms unrelated to the Cambrian animals. They dubbed this earlier event...

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2005-06-16 09:40:00

Blacksburg, Va. - A study of fossils from the Paleozoic Era, collected across the world, reveals that ancient brachiopods were little bothered by predators. However, the rare predation traces left on brachiopod shells by unknown assailants coupled with a subtle increase in their frequency through time may be the shadows on the wall that show killers were in the room and their numbers increased with time. From 550 million years ago until 250 million years ago, brachiopods, or "lampshells,"...