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Posts by
Editors of EarthSky
Shackleton to satellites: Field-work and exploration
The Shackleton ill fated expedition in Antarctica comes to mind when we consider the perils of field-work in early Antarctic exploration.
November 9, 2009
What is a flammulated owl?
The flammulated owl is unusual. It's small. It's secretive. It "coos" instead of "hoots." And it's sensitive to changes in its environment.
November 5, 2009
Reza Fazel says medical imaging carries risks
Reza Fazel found that CT scans and nuclear medicine scans tests that use radioactive tracers inside the body contribute the most to higher doses of radiation.
November 2, 2009
Changing poles, a new kind of field work
Traveling to the poles is nothing new to me. But I notice the changing poles and on this trip my job will be to help measure and understand this change.
October 29, 2009
Mexican jumping beans jump, why?
So what makes Mexican jumping beans jump? As the tiny larvae inside curl up and uncurl, they hit the capsule's wall with their heads - and the bean jumps.
October 29, 2009
What are circadian rhythms?
All animals have cycles of daily activity, called circadian rhythms. It's run by an internal biological clock that senses when the day begins and ends.
October 29, 2009
Is Earth getting farther from the sun?
The universe might be expanding, our galaxy is getting farther from other galaxies. But our sun, our Earth and its family of nine planets is not expanding.
October 29, 2009
Are camels’ humps full of water?
Camels are just very efficient at using water. If camels' humps are not full of water, why do camels have humps? And where do camels store water?
October 29, 2009
How do we know the shape of our galaxy?
The answer is ... we don't. But astronomers make educated guesses about the shape of our galaxy, in part by looking into space at other galaxies.
October 29, 2009
What is wind chill?
If you any warm object and expose it to cold air, that object will lose heat to the air. Wind chill refers to greater heat loss due to the motion of the air.
October 29, 2009
