A model of the planned Dream Chaser mini-shuttle designed by Sierra Nevada Corp. is displayed in March 2014 for a news conference at NASA's Michoud Assembly Facility in New Orleans. Janet McConnaughey/AP hide caption

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Friday
A pastrami sandwich sits on the service counter at the Carnegie Deli in New York. The deli is closing at the end of 2016. Dominick Reuter/AFP/Getty Images hide caption
Fred Armisen performs as Candace and Carrie Brownstein as Toni in a Portlandia sketch about two feminist bookstore owners in Portland. Augusta Quirk/IFC hide caption
Thursday
Pilot models of the Uber self-driving car in Pittsburgh, Pennsylvania. Angelo Merendino/AFP/Getty Images hide caption
An illustration of Rosetta just before Friday's expected landing on the comet known as 67P/Churyumov-Gerasimenko. The final approach aims to be only at "walking speed," mission specialists say, but that's enough to tip the antenna away from Earth. ATG medialab/ESA hide caption
Scientists To Bid A Bittersweet Farewell To Rosetta, The Comet Chaser
Wednesday
Agnes Nixon arrives at the 37th Annual Daytime Emmy Awards in Las Vegas in 2010. Chris Pizzello/AP hide caption
A new study finds meerkats are the most murderous mammals. Frank Bienewald/LightRocket via Getty Images hide caption
The Uruma city municipal office released this image of a 4th-century copper coin from ancient Rome that was found during an excavation of a castle in Okinawa, Japan. Jiji Press/AFP/Getty Images hide caption
A man poses with a sign of Pepe the Frog outside Hofstra University in Hempstead, N.Y., site of Monday's first presidential debate between Donald Trump and Hillary Clinton. Shannon Stapleton/Reuters hide caption
Tuesday
New York Fertility Doctor Says He Created Baby With 3 Genetic Parents
Monday
Europa is believed to have a vast subterranean, saltwater ocean that contains twice as much water as Earth's oceans. NASA/JPL/Ted Stryk hide caption
Saturday
Joe Paterno is seen on the scoreboard during a time out against the Temple Owls during the game on September 17, 2016 at Beaver Stadium in State College, Penn. Justin K. Aller/Getty Images hide caption
Friday
Grand Chief Stewart Phillip shakes the hands of First Nation leaders after they sign the Treaty Alliance Against Tar Sands Expansion during an announcement on oil sands pipelines Thursday at the Musqueam Community Centre in Vancouver, British Columbia. Ben Nelms/Reuters hide caption
Thursday
A virtually unwrapped image of writing on the inside of the partially destroyed Ein Gedi Scroll. Science Advances hide caption