Photo of the Day

A pine marten in Scotland sniffs the air.
August 16, 2018, 1:24 p.m.
The pine marten has crossed from Scotland into England, a good sign for the species and for the red squirrels trying to survive.
An aerial view of trees in the Smoky Mountain National Forest.
August 14, 2018, 2:02 p.m.
There's still cause for concern, however.
Water floats on the top of the Greenland ice sheet in 2013 due to melting
August 7, 2018, 11:51 a.m.
The habitability of the planet is at risk.
A diver inspects healthy coral in the Coral Triangle around the island of Sulawesi.
August 2, 2018, 2:17 p.m.
Using AI and underwater scooters, scientists find surprisingly healthy reefs in Indonesia's Coral Triangle.
These six infrared images of Saturn's moon Titan are some of the clearest of the icy moon so far.
July 20, 2018, 12:30 p.m.
13 years of image data from the Cassini spacecraft were used to construct these stunning images of Titan.
White shark
July 19, 2018, 11:05 a.m.
Researchers tagging juvenile sharks have confirmed where these youngsters spend the first year of their lives.
Ireland's Cliffs of Moher
July 13, 2018, 8:23 a.m.
The national investment fund currently has more than $385 million in fossil fuel investments.
A boulder-strewn field of red rocks stretches across the horizon in this self-portrait of Viking 2 on Mars' Utopian Plain in 1976.
July 12, 2018, 1:31 p.m.
A key instrument may be the culprit in this accidental rewriting of history.
New Clistopyga crassicaudata wasp on display
July 9, 2018, 12:51 p.m.
Clistopyga crassicaudata parasitoid wasp is a horrifying sight.