Science Friday Videos

Dengue fever, malaria and other tropical diseases took center stage at the American Society of Tropical Medicine and Hygiene conference. Nathan Seppa of Science News offers details, including a strange story of palm trees, fruit bats and human infection.

With NASA reporting a "significant amount" of water on the lunar surface, is it time to re-examine our priorities regarding living and working in space? Mark Sykes, director of the Planetary Science Institute, talks about why and how people should venture beyond Earth.

Researchers are hoping to improve solar energy installations by coupling a solar panel to an efficient hydrolysis unit that splits water into oxygen and hydrogen. Daniel Nocera of MIT says the approach could lead to personal solar power units that could get many houses off the grid.

The holiday season is here and for many that can mean a surge in stress. But what is stress exactly? Science Friday hit the streets of New York City to gauge stress levels and consulted with experts on the effects of stress and strategies for how to cope.

New guidelines from the U.S. Preventive Services Task Force recommend women start getting routine mammograms at age 50, not 40. Ira Flatow and guests take a closer look at the guidelines and what they mean for women's health.

In Smallpox: The Death of a Disease, Dr. D.A. Henderson recounts the history of the deadly virus, from the development of the first vaccine in the late 18th century to his involvement in the successful global eradication campaign in the 1960s and 70s.

The stars of The Big Bang Theory are two fictional Caltech physicists, but the physics problems they study are real. Bill Prady, the program's co-creator and executive producer, talks about including real-world science in the script, from dark matter to magnetic monopoles.

A NASA rocket slammed into a lunar crater in October. A second spacecraft followed minutes later, taking inventory of kicked-up debris and sending data to Earth. Scientists have now analyzed those data, which may reveal whether the moon harbors significant quantities of water ice.

In the vacuum of space, photons not wind may someday fill the sails of lightweight spacecraft, propelling them without need for engines or fuel. Louis Friedman, executive director of The Planetary Society, discusses the society's plans for a sailing spaceship prototype.

Can people develop different personalities in response to abuse? Some therapists say up to one percent of the population suffer from dissociative identity disorder. Others say the disease doesn't exist, or is very rare. Two therapists discuss the controversial diagnosis.

Researchers have figured out how to track the facial expressions of one person and map those movements onto a digital image of another person's face in real time. The result is something like a digital video puppet, which psychologists say may reveal something about human nature.

Moving beyond traditional superheroes, two new graphic novels recount the epic tales of scientists and the research that made them famous. Ira Flatow talks with authors Michael Keller and Apostolos Doxiadis about their graphic novels on natural selection and logic.

Actress Anna Deavere Smith traveled across the country interviewing people about their thoughts on health care. From an injured bull rider to a medical school dean, she recounts what she heard through monologues in her latest documentary-style theater production, Let Me Down Easy.

The U.S. Department of Energy is offering $10 million to the first individual or company to develop an energy-efficient LED replacement for the standard 60-watt incandescent bulb. DOE lighting program manager James Brodrick discusses the L Prize, and what makes a better bulb.