Nearly all sand in deserts came from somewhere else - sometimes hundreds of kilometers away. Read more about sand in the desert here.

You hear weather reports about dangerous levels of ozone, then you hear that we're in big trouble because our ozone layer is thinning.

Most flowers have both male and female parts - but some flowering plants have separate male and female flowers.

Mysterious microbes might be lurking beneath Antarctica ice sheets. Oceanographer Chuck Kennicutt is interested in how organisms would make a living out of these cold, dark environments, and believes that the discovery and analysis of such microbes could shed light on how life evolved on our planet.

Extra Antarctic snowfall could slow sea level rise, as more water stays in the ice sheets. Learn more about what this means.

Scientists at work in the Arctic say the pace of change there is now so rapid that some creatures might not be able to adapt. For example, Arctic ringed seals give birth and nurse their young in caves dug out on the snow-covered ice.

Leaders of industry, science, journalism, politics, and sustainability converge on Wednesday, March 26 in Colorado for the first Aspen Environment Forum.

In the past, desalination relied on boiling the water. But today’s newer techniques use a semi-permeable membrane. Read more about drinking seawater.

Will Steger, an Arctic explorer, began his career by traveling unsupported thousands of kilometers across the polar regions by dog sled. Read more.

Ben Holt talked about Arctic change and said "there is a sense of urgency, and that the Arctic is rapidly changing, faster than people might have imagined."