C4 proteins (green) are seen at the synapses in a culture of human neurons. (Heather de Rivera/McCarroll Lab/Harvard via AP) Heather de Rivera/AP hide caption
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Friday
Kelli Fabick of Ellisville, Mo., held her mother's Australian silky terrier, Zoey, as veterinarian Sarah Hormuth gave the dog a flu shot last April. The dog flu strain H3N2 is now circulating in more than two dozen U.S. states. St. Louis Post-Dispatch/TNS via Getty Images hide caption
Project Nourished's virtual eating gizmos. From left: An atomizer that releases the scents of a food; a virtual reality headset; a a device that mimics the chewing sounds transmitted from a diner's mouth to their ear drums; a cocktail glass with built-in sensors; a utensil that picks up on the diner's movements and integrates them into the virtual reality experience; and a 3-D printed food cube. Courtesy of Project Nourished hide caption
Thursday
(Left) Bob Ebeling in his home in Brigham City, Utah. (Right) The Challenger lifts off on Jan. 28, 1986, from a launchpad at Kennedy Space Center, 73 seconds before an explosion killed its crew of seven. (Left) Howard Berkes/NPR; (Right) Bob Pearson/AFP/Getty Images hide caption
30 Years After Explosion, Challenger Engineer Still Blames Himself
The price of getting a health insurance card may seem expensive, but officials say the minimum tax penalty for remaining uninsured is $695, and could rise to more than $10,000 for wealthy families who choose not to get coverage. Photo Alto/Getty Images hide caption
A view from Earth of a slender crescent moon in close proximity to the two brightest planets in the sky, Venus and Jupiter. Justin Lane/epa/Corbis hide caption
The dark red color and looming posture of this Octopus tetricus likely signals menace to another octopus nearby, say scientists who studied 186 octopus interactions in 52 hours of underwater video. David Scheel/Current Biology hide caption
Shifting Colors Of An Octopus May Hint At A Rich, Nasty Social Life
Wednesday
New York City called a travel ban on vehicles in Times Square and elsewhere during last weekend's storm, which broke snowfall records all along the Mid-Atlantic coast. Yana Paskova/Getty Images hide caption
A Big El Niño Was The Likely Instigator Of Last Week's Blizzard
Capers Blades "singles on a half shell" oysters grown by farmer Dave Belanger (aka Clammer Dave) in Capers Inlet, S.C. David Malosh/Bloomsbury hide caption
In the game Go, players use white or black stones to attempt to fence off territory. iStockphoto hide caption
Tuesday
The Aedes aegypti mosquito is one of two types thought to be capable of carrying and transmitting the Zika virus. Nelson Almeida/AFP/Getty Images hide caption
Big Zika Virus Outbreak Unlikely In The U.S., Officials Say
Astrophysicist Neil deGrasse Tyson released a track in response to rapper B.o.B's song promoting the flat Earth theory. Evan Agostini/Invision/AP hide caption
The New Jersey Department of Environmental Protection and Department of Health advise against eating any fish from the Lower Passaic because it may be contaminated with toxic chemicals. But Owaldo Avad says he's been catching and consuming fish like these from the river for eight years. Sarah Gonzalez/WNYC hide caption
New Jersey River Polluters Fund Toxic Fish Swap — But There's A Snag
The Doomsday Clock stayed fixed at three minutes to midnight — the closest it has been to midnight since 1984. Saul Loeb/AFP/Getty Images hide caption