Brightsurf Science News & Current Events

November 22, 2000
Biomolecular motors with propellers can live inside cells
Nanobiotechnologists at Cornell University have built and pilot-tested the first biomolecular motors the size of virus particles with tiny metal propellers.

Plant and animal bacteria share cell-killing mechanism
Yersinia pestis---the bacterium that causes bubonic plague kills quietly and efficiently by first slipping inside immune system sentinel cells and cutting off the communication lines they need to call for help.

The 'descent of women' a silent epidemic
Pelvic floor disorders can greatly decrease the quality of life.

Cloning can turn back the developmental clock
Researchers from the Whitehead Institute and the University of Hawaii provide molecular evidence for the egg's ability to reprogram an adult cell back to its embryonic state and show for the first time that X-inactivation in clones occurs in a similar manner to that in normal development.

New type of serotonin receptor identified
HHMI researchers studying the roundworm Caenorhabditis elegans have identified a new type of serotonin receptor.

Animals regulate their numbers by own population density
Zoologists from the University of Toronto have cracked the ecological puzzle of how animals - in this case the arctic ground squirrel - manage to control their own population in the northern boreal forest of Canada. is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to