Sign Up for Our Amazing Newsletter!
A daily update by email. Science news, great photos, sky alerts.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Posts by
Editors of EarthSky
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
‘Mowing the lawn’ at high altitude
The ICE Bridge mission - dubbed "mowing the lawn" has been so successful that eight flights will be added keeping us in Chile until Thanksgiving.
November 17, 2009
Meteors, are they bright enough to read by?
Usually, meteors are not bright enough to read by. But some spectacular showers can offer a true spectacle of light and might be bright enough to read by.
November 13, 2009
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
