In Antarctica, red lights are used on vehicles during the winter darkness because their light wavelength does not interfere with science experiments. The bright lights on the left are on a tractor moving supplies.
Image credit: Mel MacMahon, National Science Foundation / Source: U.S. Antarctic Program photo Library
Part education tool, part neuroscience party trick, the Glassbrain app was first used on stage in 2012 on Mickey Hart, former drummer for the Grateful Dead, to show his brain reacting to music. A cap detects the different types of waves and signals pinging across the user's brain. The app then displays them in real time on a 3-D image built from brain scans taken earlier. Each color r...
Take a look back at some of the EPODs our viewers found particularly eye-catching. Today, and every Saturday EPOD invites you to rediscover favorites from the past. Saturday posts feature an EPOD that was chosen by viewers like you in our monthly Viewers’ Choice polls. Join us as we look back at these intriguing and captivating images.
Drumlins of Clew Bay, Ireland Epod.usra.edu
Photographer: Thomas McGuire
Summary Author: Thomas McGuire In spite of its currently moderate climate, Ireland displays impressive features of past glaciation from periods of geologic history known as Ice Ages. One example is the drumlin field of Clew/Newport Bay, on the island's North Atlantic coast. In fact, the name drumlin is derived from the Irish word, droiroimnín (littlest ridge).
Aurora Australis Apod.nasa.gov
Not fireworks, these intense shimmering lights
Venus and Jupiter are Far Apod.nasa.gov
On June 30 Venus and Jupiter were actually far apart, but both
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Astronomers using NASA's Hubble Space Telescope have discovered an immense cloud of hydrogen dubbed "The Behemoth" bleeding off a planet orbiting a nearby star. The enormous, comet-like feature is about 50 times the size of the parent star. The hydrogen is evaporating from a warm, Neptune-sized planet, due to extreme radiation from the star. A phenomenon this l...
Hubble Sees the 'Teenage Years' of Quasars Hubblesite.org
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Quasars are the light fantastic. They are the brightest beacons in the universe, blazing across space with the intrinsic brightness of one trillion suns. Yet the objects are not vast galaxies, but they appear as pinpoint sources in the biggest telescopes of today hence the term "quasar" for quasi-stellar object. Discovered in the 1960s, it took more than two d...
NASA Earth Observatory Image of the Day
Exploring Reefs from Space Earthobservatory.nasa.gov
An image of Fiji’s coast shows how modern satellites can help study underwater corals even in the most remote regions.
Obersulzbach Glacier Plus Four Earthobservatory.nasa.gov
The retreat of one of Austria’s largest glaciers has stranded some of its tributaries, now classified as separate glaciers.
Brown Capuchin - The Little Monk Monkey Thewebsiteofeverything.com
Don McClane (aka Don McClane@Flickr) took this beautiful photo at Botanica Gardens in Wichita, Kansas. Solanum pyracanthos is native to Madagascar and is a member of the genus that includes tomatoes, potatoes and eggplants. I wouldn't try to eat the small fruits without a good indication of their edibility, however, as many members of the Solanum are poisonous (at least when raw).
Solanum is o...
Carex utriculata BotanicalGarden.ubc.ca
Today's photo features a stand of Carex utriculata, photographed by Matt Lavin (aka Matt Lavin@Flickr). This strikes me as an uncommonly beautiful image of the common beaked sedge.
I have had a fondness for sedges ever since I took one of my first ecology classes, when my fiery Scottish professor taught me, in a thick, R-rolling brogue, that "Rrrrushes are rrrround, and sedges have edges!" I h...