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Optimum "sperm load"

Attractive males release fewer sperm per mating to maximise their chances of producing offspring across a range of females, according to a new paper on the evolution of ejaculation strategies. The findings by researchers at UCL (University College London) and the University of Oxford suggest that, paradoxically, matings with attractive males may be less fertile than those with unattractive ones.

9 Jul 2009

How is sexual conflict over parental care resolved?

Parents compensate for a lazy partner by working harder to bring up their offspring, but not enough to completely make up for the lack of parenting, says research by bird biologists at the University of Bath and Bristol.

6 Jul 2009

Research examines history of H1N1 and provides cautionary tale about the use of extinct viruses

The current H1N1 swine flu strain has genetic roots in an illness that sickened pigs at the 1918 Cedar Rapids Swine Show in Iowa, report infectious disease experts at the University of Pittsburgh Graduate School of Public Health in the New England Journal of Medicine.

30 Jun 2009

Intervention strategies to curb spread of pandemic flu

Mathematicians, biostaticians and public health officials from Canada, Mexico and the United States will gather at Arizona State University this week to focus on understanding, possibly mitigating the spread of the H1N1 flu virus. They are planning to take up the challenge of proposing science-based strategies that can slow the spread of pandemic flu.

24 Jun 2009

Scientists unearth the roots of human genetic variation

A new study at the University of Leicester is using advanced single molecule methods to explore processes that lie at the very core of DNA variation in humans.

23 Jun 2009

DNA template could explain evolutionary shifts

Rearrangements of all sizes in genomes, genes and exons can result from a glitch in DNA copying that occurs when the process stalls at a critical point and then shifts to a different genetic template, duplicating and even triplicating genes or just shuffling or deleting part of the code within them, said researchers from Baylor College of Medicine in a recent report in the journal Nature Genetics.

22 Jun 2009

Big disparities in the treatment of arrhythmias across Europe

The latest statistics regarding the use of pacemakers and implantable cardiac devices in Europe was presented on Sunday 21 June, at EUROPACE 2009, the meeting of the European Heart Rhythm Association (EHRA) which takes place in Berlin, Germany from 21 to 24 June.

22 Jun 2009

Goby fish may bring new drugs for high blood pressure

Medical scientists at the University of Leicester are investigating how a species of fish from the Pacific Ocean could help provide answers to tackling chronic conditions such as hereditary high blood pressure and kidney disease.

22 Jun 2009

BBC examines river blindness program in sub-Saharan Africa

BBC examines a campaign in sub-Saharan Africa that is helping to distribute drugs to prevent onchocerciasis, also known as river blindness - a disease "caused by a parasite that is spread from human to human by the black fly, which once flourished along river beds where there is fast-flowing water."

21 Jun 2009

New theory for global diabetes epidemic

A new "fertility first" hypothesis published this week by a group of international experts in the American Journal of Human Biology, proposes that the global epidemic of Type 2 diabetes has its origins in the struggle, over millennia, to sustain human fertility in environments defined by famine.

19 Jun 2009

New findings on how stress causes sexual dysfunction and infertility

University of California, Berkeley, researchers have found what they think is a critical and, until now, missing piece of the puzzle about how stress causes sexual dysfunction and infertility.

16 Jun 2009

Gene evolution process discovered

One of the mechanisms governing how our physical features and behavioural traits have evolved over centuries has been discovered by researchers at the University of Leeds.

15 Jun 2009

Scientists create simple chemical system that mimics DNA

A team of Scripps Research scientists has created a new analog to DNA that assembles and disassembles itself without the need for enzymes. Because the new system comprises components that might reasonably be expected in a primordial world, the new chemical system could answer questions about how life could emerge.

13 Jun 2009

‘Designer molecules’ being developed to fight disease

Researchers in the Department of Cardiovascular Sciences at the University of Leicester are developing a new way to make protein based drugs with potential applications in stroke, vascular inflammation, blood vessel formation, regenerative medicine and tissue engineering.

11 Jun 2009

Social moms make better moms, at least in baboons

Female baboons who have strong social relationships with other females give birth to offspring who are much more likely to survive to adulthood than baboons reared by less social mothers, according to a new study by researchers at the University of Pennsylvania, the University of California, Los Angeles, and others.

11 Jun 2009

Obama ramping up efforts to overhaul the nation's health care system

President Barack Obama is ramping up his efforts to overhaul the nation's health care system, including devoting his Saturday radio and video address to health reform.

9 Jun 2009

Research identifies 3D structure of key nuclear pore building block

The genome of complex organisms is stashed away inside each cell's nucleus, a little like a sovereign shielded from the threatening world outside.

8 Jun 2009

New research looks at the role of geography in human adaptation

New research indicates that natural selection may shape the human genome much more slowly than previously thought. Other factors -- the movements of humans within and among continents, the expansions and contractions of populations, and the vagaries of genetic chance - have heavily influenced the distribution of genetic variations in populations around the world.

5 Jun 2009

New ‘molecular clock’ provides more accurate method of dating ancient human migration

Researchers at the University of Leeds have devised a more accurate method of dating ancient human migration - even when no corroborating archaeological evidence exists.

4 Jun 2009

Noninvasive screening test detects digestive cancers in multiple organs

Mayo Clinic researchers have demonstrated that a noninvasive screening test can detect not only colorectal cancer but also the common cancers above the colon -- including pancreas, stomach, biliary and esophageal cancers. This is one of more than 100 Mayo Clinic studies being presented at Digestive Disease Week 2009 in Chicago, May 30 - June 4.

2 Jun 2009