Tech & Science
Meet the Press
Boston Bombing Anniversary
30 Seconds To Know
Robbed! Huge Shark Off Record Books Due to Technicality
Oklahoma Lifts Stay of Execution for Convicted Killers
Michael Phelps Comes Out of Retirement
'Swatting' Hoax Tricks Police SWAT Teams
More from NBC
Next Steps For Vets
NASA Astronaut Shares His Spacewalk Selfie
NASA's Rick Mastracchio snaps a self-portrait during a spacewalk at the International Space Station, and then shares the world's highest selfie.
Holy Hemihelix! Scientists Discover a Bizarre Twist
Researchers learn how to create a natural helix that looks like a tangled telephone cord — and that could lead to new kinds of fiber-optic circuitry.
Gabriel Martins / Nikon Small World
Virtual Baby Quail Tops Nikon Contest's Video Menu
You can dissect a tiny quail in its egg, slice by virtual slice, in the video that took top honors in the Nikon Small World in Motion competition.
NASA via AP file
Spacewalkers Make Quick Work of Computer Repair
Two spacewalkers quickly replaced a bad backup computer box and took on some extra tasks at the International Space Station on Wednesday.
Duck! Asteroids Strike Earth More Often Than We Think
Sensors designed to monitor nuclear tests have detected more asteroid explosions than expected, even since last year's spectacular Russian meteor.
NASA Chief Tells Off Asteroid Critics: 'Get Over It'
NASA's chief has a message for those who want him to forget about going to a near-Earth asteroid and head directly for Mars instead: "Get over it."
Antarctica Was Once Like California, Studies Show
Scientists are tracing millions of years of Antarctica's climate history, including an age when parts of the continent were as warm as California.
For What Porpoise? U.S., Russian Dolphins Won't Face Off
The U.S. Navy says there's no truth to claims that its dolphins are heading to a Black Sea faceoff with Russian combat dolphins seized from Ukraine.
Meteorit Nad Murmanskom via YouTube
Murmansk Meteor: Dashcams Spot Russian Fireball
A fireball like the one that flashed over Russia last year has been sighted over another Russian city, but this one wasn't as destructive.
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