Ardis Hoven, chair-elect of AMA, on health insurance reform

Dr. Ardis Hoven told EarthSky that her organization, of more than a quarter million physicians and medical students in the U.S., believes the health care system in the U.S. needs reform.

Do plants grow as well under artificial light?

There are some differences between sunlight and artificial light - most artificial light doesn't emit as much energy in the red and blue region of the light spectrum as sunlight does.

Harry Gray: Solar fuel cells will create fuel from sunlight

Just as plants use sunlight to make their own energy, Harry Gray says his solar fuel cells could one day create enough fuel from the sun to provide the energy humanity needs.

Drew Endy: Synthetic biology for new genetic material

Drew Endy points to the development of an antimalarial drug as a successful product of synthetic biology. And talks about future goals of synthetic biology.

Will we ever fully understand ourselves?

Will we ever fully understand ourselves? This is a very philosophical question.

What causes the hiccups?

You might get hiccups if you laugh too hard, or eat spicy food, or if your stomach becomes bloated. And everyone has a favorite hiccup remedy.

Mark Mehos explains Concentrating Solar Power technology

Mark Mehos believes this technology - known as CSP - is particularly promising because it can store up energy to be used on cloudy days.

Reflective crops may curb global warming

How leaves are arranged in the canopy can make a big difference as to how much sunlight is reflected back from the reflective crops.

World population: 7 billion on the horizon

Global world population numbers are on track to reach 7 billion in 2011, just 12 years after reaching 6 billion in 1999.

Denise Bode has high hopes for American windpower

Denise Bode talks about the environmental and economic benefits of windpower, and urges the U.S. to adopt a national renewable electricity standard.