More than 15,000 scientists in 184 countries have signed a letter urging the world to address major environmental concerns. "Soon it will be too late to shift course away from our failing trajectory, and time is running out."

Eleanor Imster

November 16, 2017

Platform reflecting

At first this looks like a cube floating in space ... but look again.

Eleanor Imster

November 16, 2017

Earth’s shadow

Earth's shadow (in dark blue) climbs above the Raquette River in Potsdam, New York, shortly after sunset.

Eleanor Imster

November 15, 2017

Citizen inventors: NASA’s 3D Printed Habitat Challenge

Future space missions won't be able to carry all their building materials from Earth. Competitors are challenged to fabricate habitats using indigenous materials. $2 million prize!

Eleanor Imster

November 14, 2017

When mammals switched from nights to days

Mammals once were night creatures. A new study suggests they became active in daylight after the dinosaurs went extinct, 66 million years ago.

Eleanor Imster

November 12, 2017

November sunset over Stainforth, UK

Graham Telford captured this sunset while he was fishing at Stainforth, a village in the United Kingdom.

Eleanor Imster

November 8, 2017

2016 greenhouse gases at record high

As climate talks open in Bonn, Germany this week, negotiators are considering a report from the World Meteorological Organization, urging action now.

Deborah Byrd

Eleanor Imster

November 7, 2017

Eleanor Imster

Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. She and her husband live in Tennessee, where they enjoy guitar playing and singing. They have 2 grown sons.