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Posts by
Editors of EarthSky
Howard Herzog explains what clean coal means
Some people say there's no such thing. EarthSky asked research engineer Howard Herzog at the MIT Energy Initiative what 'clean coal' means.
December 21, 2009
Antarctic mission’s first season: Making sense of it all
It is bittersweet to reach the end of a season in Antarctic. It is good to be going home, the data that we have collected shows me there is a sobering trend.
December 17, 2009
Why do I get dizzy when I stand up?
Why do you get dizzy? If you've been sitting awhile, blood could pool in your legs, so there's less blood being pumped to your brain.
December 12, 2009
Benjamin Glasser on making liquid fuel from coal
Listen to chemical engineer Benjamin Glasser talk about an innovative, cleaner process that could convert coal to liquid gasoline without producing as much carbon dioxide.
November 30, 2009
Balloons: How high can they fly?
Helium balloons rise higher than hot air balloons. The current altitude record for a helium balloon was set by Malcolm Ross, who flew to over 113,000 feet.
November 28, 2009
What causes the colors in flames?
When you gaze at a wood fire, you might notice different colors in flames. What causes them? It's like the colors of stars indicate their temperatures.
November 28, 2009
Time can warp and it’s related to space
The answer is yes. Time can warp. Strange as it may sound, both time and space do indeed warp around large celestial bodies. But it's complicated.
November 28, 2009
Is twilight shorter at the equator?
The sun drops quickly down toward the horizon - and just as quickly sinks below the horizon - as seen from Earth's equatorial latitudes.
November 28, 2009
Why does an airplane make a sonic boom?
A sonic boom happens when an airplane flies faster than the speed of sound. Chuck Yeager was the first to break the sound barrier in the year 1947.
November 20, 2009
Were ancient buildings more energy efficient?
Our sleek, glass-box buildings of today tend not to take climate into consideration. Were ancient buildings more energy efficient?
November 20, 2009
