A water-dwelling rotifer (Brachionas calyciflorus) is surrounded by algae (Chlorella vulgaris) it hopes to eat by waving its cilia, at top, and drawing them into its mouth. In fresh water, these rotifers are barely visible as white specks while the microscopic algae are 100 times smaller. T.Yoshida and R.O. Wayne/Cornell University.
Glass chemostats like these, filled with water, nutrients, predators and prey - were used to demonstrate rapid evolution in a matter of weeks by Cornell biologists, including, from left, Nelson Hairston Jr., Stephen Ellner and Gregor Fussmann. Cornell University Photography Copyright © Cornell University
In the fishbowl of life, when hordes of well-fed predators drive their prey to the brink of extinction, sometimes evolution takes the fast track to help the hunted survive -- and then thrive to outnumber their predators.
This rapid evolution, predicted by Cornell University biologists in computer models and demonstrated with Pac-Man-like creatures and their algae food in laboratory habitats called chemostats, could play an important role in the ecological dynamics of many predator-prey systems, according to an article in the latest issue (July 17, 2003) of the journal Nature .
Physicians, the Cornell biologists say, should keep this rapid evolution in mind when investigating interactions between diseases and victims. As one example, they say, it is useful in trying to understand how HIV, the AIDS virus, manages to evolve so swiftly that development of improved vaccines is extremely difficult.
Roger Segelken | Cornell University News Service
Seeing on the Quick: New Insights into Active Vision in the Brain
15.08.2018 | Eberhard Karls Universität Tübingen
New Approach to Treating Chronic Itch
15.08.2018 | Universität Zürich
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur
What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...
08.08.2018 | Event News
27.07.2018 | Event News
25.07.2018 | Event News
16.08.2018 | Information Technology
16.08.2018 | Health and Medicine
16.08.2018 | Information Technology