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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.
May 5, 2008
Clear skies over Arctic cause more melting
More Arctic sea ice melts under sunny and clear skies. Why is that important? Because sea ice is one of the most visible manifestations of climate change.
May 3, 2008
How did sand in the desert get there?
Nearly all sand in deserts came from somewhere else - sometimes hundreds of kilometers away. Read more about sand in the desert here.
May 2, 2008
Is there good ozone and bad ozone?
You hear weather reports about dangerous levels of ozone, then you hear that we're in big trouble because our ozone layer is thinning.
May 2, 2008
Do flowering plants have sexes?
Most flowers have both male and female parts - but some flowering plants have separate male and female flowers.
May 1, 2008
Milky Way to collide with giant gas clouds
In the far future, a giant cloud of hydrogen will collide with our Milky Way galaxy and help create thousands of new stars.
April 20, 2008
EarthSky is a 2008 Webby Honoree
EarthSky Communications has joined New Yorker Fiction, NPR, CNN, and ESPN and eight others as a 2008 Webby Honoree in...
April 11, 2008
A long-ago hypernova identified from a star halo
Astronomers have identified the telltale sign of a possible hypernova - a huge stellar explosion - in one of our galaxy's oldest stars.
April 9, 2008
Science in an election year with EarthSky
EarthSky focuses on science in an election year. Read more about the 2008 election and debating science and technology with presidential candidates.
April 6, 2008
Habitable zones around distant worlds
Are we alone in the universe, or is there intelligent life out there? And if so, how would we find it? Read more about habitable zones on distant worlds.
April 5, 2008
