POPClocks keep ticking in 2008

It sometimes feels as if we humans are in a race. The race is between our own burgeoning population numbers, and our political and technological will to solve the problems that come with increasing population.

Do humans use only part of the brain?

Ever heard that we humans only use a small portion of our brains? Pamela Zamora in Mexico asks the scientists, and Dr. Jay Giedd responds.

Brian Greene wants focus on the drama of science

Brian Greene, Columbia University physicist and co-founder of the World Science Festival, wants people to know that science is dynamic.

Alan Alda on seeing beauty through science

Actor and writer Alan Alda talks about the beauty and wonder of science, in advance of his appearance at the World Science Festival in New York City.

Fortifying foods with nano-capsules

Listen to Jochen Weiss of the University of Hohenheim speak about using nanotechnology to add omega-3 fatty acids to a variety of foods. Read more about fortifying foods.

Ancient farming practice improves today’s soil

Global food supply tops the agenda of many scientists. A piece of prehistoric wisdom of ancient farming combined with modern science could be a big help.

Seawater is not good to drink. Here’s why

If you're stranded at sea it's better to hope for rain than to drink seawater. Read more about why people shouldn't drink seawater here.

How far can a human see?

There's no practical limit on how far away we can see - if we're looking at objects brighter than their backgrounds. Read more about how far can a human see.

Altitude sickness: What is it, what does it do?

People with altitude sickness feel tired and nauseated - have a headache - and may feel strangely uneasy.

Gene protects grains from disease

A gene protects grains (wheat, rice, corn, barley) from disease. Our species owes its survival in part to the stoutness of the disease-resistant gene in grains.