TIME.com: Top Science and Health Stories

Q&A: Dennis Sewell on Charles Darwin's Dark Legacy

Tue, 24 Nov 2009 14:35:00 EST

On the 150th anniversary of the publication of On the Origin of Species, political journalist Dennis Sewell talks to TIME about how the naturalist's big idea has been harnessed for sinister ends

Prehistoric Super-Crocodiles May Have Dined on Dinosaurs

Tue, 24 Nov 2009 14:35:00 EST

An odd new species of ancient crocodiles stood on two legs, lived alongside dinosaurs and sometimes even hunted them

Pap Tests: Another Revision of Recommendations

Tue, 24 Nov 2009 14:35:00 EST

Days after a government task force rolled back its mammography screening recommendations, another influential group issued revised guidelines on Pap tests for young women

The New Mammogram Guidelines: What You Need to Know

Tue, 24 Nov 2009 14:35:00 EST

If the brouhaha over new mammogram guidelines has proved anything, it's that even modern medicine does not rely on statistics, scientific facts and clinical outcomes alone

Spotlight: New Mammogram Guidelines

Tue, 24 Nov 2009 14:35:00 EST

An independent government panel this week abandoned its long-standing recommendation that healthy women over 40 get a breast-cancer screen once every year or two years

Carbon Sinks: Oceans Absorbing Less Carbon Dioxide

Tue, 24 Nov 2009 14:35:00 EST

A new study finds that the oceans' ability to absorb man-made carbon emissions may be dwindling at the same time the world's emissions rates show no sign of slowing

U.S. Gets a D on Preterm Birth Rates, Says March of Dimes

Tue, 24 Nov 2009 14:35:00 EST

Among the many reasons for the high preterm birth rate in the U.S.: lack of insurance, cigarette smoking and elective cesarean-section deliveries that are scheduled too early

World Toilet Day Raises Sanitation Awareness

Tue, 24 Nov 2009 14:35:00 EST

From outhouses to water closets, humans have been devising creative ways to go to the bathroom since, well, the first person crossed his legs with an urgent need to go

Flibanserin Drug: Will 'Female Viagra' Boost Sex Drive?

Tue, 24 Nov 2009 14:35:00 EST

Drug companies have long sought to develop the "female Viagra," but it's hard to find a cure when you don't know exactly what you're treating

Panel Suggests Delaying Regular Mammograms Until Age 50

Tue, 24 Nov 2009 14:35:00 EST

In a turnaround from long-standing guidelines from the American Cancer Society, a U.S. task force recommends that women begin regular breast-cancer screening at age 50, not 40

U.S. vs. China: Working Together on Global Warming?

Tue, 24 Nov 2009 14:35:00 EST

At loggerheads over several issues, the senior and junior superpowers (andcarbon producers) have lots of potential common ground on climate change

Heart Transplants: A Brief History

Tue, 24 Nov 2009 14:35:00 EST

Twenty-five years after Baby Fae's death following the world's first animal-to-human infant heart transplant, TIME looks back at the history of the procedure

China: Two Die After Swine Flu H1N1 Vaccine

Tue, 24 Nov 2009 14:35:00 EST

Two deaths in people receiving the H1N1 vaccine were reported in China, where an estimated 12 million have been inoculated so far

Protecting Forests May Still Help Climate-Change Fight

Tue, 24 Nov 2009 14:35:00 EST

Climate negotiators have real hope that a proposed agreement to reduce deforestation could prove to be a bright spot in a meeting that might otherwise be considered a failure