Finding has implications for future of biodiversity
A significant number of organisms that survived the five greatest mass extinctions in Earths history subsequently failed to achieve evolutionary success, according to a new study funded by the National Science Foundation (NSF) and conducted by University of Chicago scientist David Jablonski.
“Its clear that there is a lot of evolutionary action in the aftermath of mass extinctions,” said Jablonski. “During the re
Along with Canadian colleagues, a University of North Carolina at Chapel Hill scientist has discovered fossils of plants dating back some 420 million years.
The discovery, made on Bathurst Island in the Northwest Territories about 800 miles from the North Pole, shows vascular plants were more complex at that time than paleontologists previously believed and is significant for that reason, the UNC researcher said.
“These are not the earliest vascular plants ever found, but they are
Consider the plight of the lonely nene goose: Fated to occupy just one island in all the world; reduced in numbers to fewer than 30 individuals by the middle of the last century; each bird as closely related to the others as human siblings.
What caused the narrowing of the nenes circumstances to the point of near-extinction? Was the isolation of island living to blame for draining their gene pool to a puddle, or was it caused by the 20th century population decline? How did they surviv
In the Arctic and Antarctic seas the water gets cold to minus 1.9 C in winter, but somehow some fish live there. These cold-blooded creatures survive in the icy water because the blood in their veins contains antifreeze proteins and glycoproteins. High levels of the antifreeze proteins are found in the blood serum, they are present in cell cytoplasm and all body fluids except urine. Due to their structure, molecules of antifreeze glycoproteins (AFGP) prevent growth of ice crystals. Natural antifreeze
A controversial research study here has found that exposing cells infected with feline immunodeficiency virus – a surrogate for HIV – to methamphetamine increases those cells ability to replicate the deadly virus as much as 15-fold.
The finding, if confirmed by ongoing animal studies, could answer important questions about how lentiviruses such as FIV and HIV can gain a foothold in the brain. That knowledge is vital in slowing or lessening the dementia that often accompanies AIDS and s
An unusual conifer found in a remote area of northern Vietnam has been identified as a genus and species previously unknown to science. The limestone ridges where the tree grows are among the most botanically rich areas in Vietnam, said Daniel Harder, currently director of the University of California at Santa Cruz (UCSC) Arboretum and a co-discoverer of the new species. The discovery is published in the current issue of the journal Novon.
“Biologists don’t need to contemplate finding life