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Differences between parental selection for adoption and embryo donation unfair
The magnitude of the difference between the selection criteria for adoption and embryo donation is unfair and unjustifiable. The procedures should be reassessed, argues an analysis in the Journal of Medical Ethics. The differences hinge on the social and emotional suitability criteria for adoption - fitness to parent - and the medical suitability... view more... (2002-05-27)
Romance, schmomance - Natural selection continues even after sex
Some breaking news, just in time for Valentine's Day: Researchers have identified something called 'sperm competition' that they think has evolved to ensure a genetic future. In sexual reproduction, natural selection is generally thought of as something that happens prior to - and in fact leads to - the Big Event. view more (2007-02-13)
How did bilaterally symmetric flowers evolve from radially symmetric ones?
The researchers found that plants bearing bilaterally symmetrical flowers were more visited by pollinators and had higher fitness, measured by both the number of seeds produced per plant and the number of seeds surviving to the juvenile stage, than plants with radially symmetric flowers. view more (2006-10-03)
Snail venoms reflect reduced competition
A study of venomous snails on remote Pacific islands reveals genetic underpinnings of an ecological phenomenon that has fascinated scientists since Darwin. view more (2009-05-21)
Success in medical training
Psychometric tests should be included in the selection methods used to recruit medical students. This is the key recommendation from an ongoing study conducted by Dr Eamonn Ferguson and Professor David James from the University of Nottingham and Fiona O'Hehir from the Oxford Consulting Group. The full set of available findings is being presented... view more... (1998-12-23)
Natural born repellents
Are you a mosquito magnet? If you are, it's not your sweet smelling blood that attracts them, scientists say - you simply lack a chemical that some humans produce that masks your attractiveness to bugs, tricking them into thinking that you are not a suitable host. "For the first time, we can identify exactly which chemicals the insects... view more... (2004-03-26)
Old before their time? Aging in flies under natural vs. laboratory conditions
Evolutionary studies of aging typically utilize small, short-lived animals (insects, worms, mice) under benign conditions - constant temperature and humidity, no parasites, superabundant food - in the laboratory. Oddly enough, very little is known about aging in such animals in their harsh, stressful natural environments. Could it be that these... view more... (2008-09-08)
Study discovers secret of Scottish sheep evolution
Researchers from the University of Sheffield, as part of an international team, have discovered the secret of why dark sheep on a remote Scottish Island are mysteriously declining, seemingly contradicting Darwin's evolutionary theory. view more (2008-01-18)
Columbine flowers develop long nectar spurs in response to pollinators
In flowers called columbines, evolution of the length of nectar spurs--the long tubes leading to plants' nectar--happens in a way that allows flowers to match the tongue lengths of the pollinators that drink their nectar, biologists have found. view more (2007-06-08)
Reverse evolution in real-time
In his book, Wonderful World, Stephen Jay Gould writes about an experiment of 'replaying life's tape', wherein one could go back in time, let the tape of life play again and see if 'the repetition looks at all like the original'. view more (2009-01-12)
Natural climate change may be larger than commonly thought
A new study of climate in the Northern Hemisphere for the past 2000 years shows that natural climate change may be larger than generally thought. This is displayed in results from scientists at the Stockholm University, made in cooperation with Russian scientists, which are published in Nature on 10 Feb 2005. view more (2005-02-09)
Why do we choose our mates? Ask Charles Darwin, prof says
Charles Darwin wrote about it 150 years ago: animals don't pick their mates by pure chance - it's a process that is deliberate and involves numerous factors. view more (2009-06-16)
Cognitive tests are the best way to select medical students
Cognitive ability tests are the best way for medical schools to select their entrants, rather than interviews and psychological tests, says an editorial in this week's BMJ. view more (2008-04-11)
Potent urine gets the girl
Scientists at the Centre of Marine Sciences (University of the Algarve) have discovered that female tilapia fish are highly sensitive to the smell of male tilapia urine during courtship, especially a territorial male's more potent urine. As Drs. Eduardo Barata and Peter Hubbard, the project's leading scientists, state, "As compared with other... view more... (2003-03-26)
Researchers find natural section favors parasite fitness over host health
Why do parasites harm their hosts? Classic evolutionary theory predicts that parasites become more virulent because they must transmit themselves between hosts, yet scientists have found little data to support this idea, until now. view more (2008-05-13)
Outwitting pesky parasites
Across the southern United States, an invisible, yet deadly parasite known as the root-knot nematode is crippling soybean crops. view more (2007-07-16)
Evidence that up to 10 percent of human genome may have changed very recently revealed by CU researchers
A Cornell study of genome sequences in African-Americans, European-Americans and Chinese suggests that natural selection has caused as much as 10 percent of the human genome to change in some populations in the last 15,000 to 100,000 years, when people began migrating from Africa. view more (2007-07-12)
Hidden genitalia in female water striders makes males 'sing'
In a study published in the open-access, peer-reviewed journal PLoS ONE June 10, Chang Seok Han and Piotr Jablonski at Seoul National University, Korea, report that by evolving a morphological shield to protect their genitalia from males' forceful copulatory attempts, females of an Asian species of water strider seem to "win" the... view more... (2009-06-12)
Study sheds light on evolution of human complexity
A painstaking analysis of thousands of genes and the proteins they encode shows that human beings are biologically complex, at least in part, because of the way humans evolved to cope with redundancies arising from duplicate genes. view more (2009-11-04)
Identifying Mega-Targets for High-Yield Plant Breeding
Promoting genetic diversity in crops is traditional practice for agriculture professionals, and with today's technology, scientists are able to develop breeding programs with great care for the security of crops. This is particularly important due to the numerous risks the world's food supplies face with the changing climate. view more (2009-02-17)
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