This site is not maintained. Click here for the new website of Richard Dawkins.

Are humans still evolving? Absolutely, says new analysis of long-term survey of human health

Thanks to Richard P. for the link.
http://www.physorg.com/news175185659.html

"There is this idea that because medicine has been so good at reducing mortality rates, that means that natural selection is no longer operating in humans," said Stephen Stearns of Yale University. A recent analysis by Stearns and colleagues turns this idea on its head. As part of a working group sponsored by the National Evolutionary Synthesis Center in Durham, NC, the team of researchers decided to find out if natural selection — a major driving force of evolution — is still at work in humans today. The result? Human evolution hasn't ground to a halt. In fact, we're likely to evolve at roughly the same rates as other living things, findings suggest.

Taking advantage of data collected as part of a 60-year study of more than 2000 North American women in the Framingham Heart Study, the researchers analyzed a handful of traits important to human health. By measuring the effects of these traits on the number of children the women had over their lifetime, the researchers were able to estimate the strength of selection and make short-term predictions about how each trait might evolve in the future.

After adjusting for factors such as education and smoking, their models predict that the descendents of these women will be slightly shorter and heavier, will have lower blood pressure and cholesterol, will have their first child at a younger age, and will reach menopause later in life.
...
Continue reading
http://www.physorg.com/news175185659.html

TAGGED: EVOLUTION, MEDICINE


RELATED CONTENT

Planet of the apes

Stephen Cave - Financial Times Comments

What we really know about our evolutionary past – and what we don’t

WALK DARWIN’S TREE OF LIFE ~ 25 - 26...

- - Ancestors Trail Walk Comments

WALK DARWIN’S TREE OF LIFE ~ 26 AUGUST 2012 - event begins on Saturday 25 August

Astrophysicists simulate 14 billion...

Liat Clark - Wired.co.uk Comments

Astrophysicists simulate 14 billion years of cosmic evolution in high resolution

Study casts doubt on human-Neanderthal...

Alok Jha - The Guardian Comments

Cambridge scientists claim DNA overlap between Neanderthals and modern humans is a remnant of a common ancestor

Why do organisms build tissues they...

- - Science Blog Comments

Why, after millions of years of evolution, do organisms build structures that seemingly serve no purpose?

New flat-faced human species possibly...

Charles Choi - CBS News Comments

Four decades ago, in 1972, the Koobi Fora Research Project discovered the enigmatic fossilized skull known as KNM-ER 1470 which ignited a now long-standing debate about how many different species of early Homos existed.

MORE

Comments

Comment RSS Feed

Please sign in or register to comment