Weekly roundup

(Left to right): Rui Duarte/Flickr; Nordroden/iStockphoto; Duncan Walker/iStockphoto

Top stories: A 400-year-old shark, smashing a famous science hoax, and more

Mutation that made it easier to ride horses evolved more than 1000 years ago

Sitting in the saddle can still be a bumpy ride, but things got a lot smoother nearly 12 centuries ago, when a single genetic mutation arising in the medieval United Kingdom and Iceland gave horses their ability to “amble,” or walk with a relatively smooth, four-beat rhythm versus a bumpier, more erratic pattern.

Greenland shark may live 400 years, smashing longevity record

Imagine having to wait a century to have sex. Such is the life of the Greenland shark—a 5-meter-long predator that may live more than 400 years, according to a recent study, making it the longest lived vertebrate by at least a century. So it should come as no surprise that the females are not ready to reproduce until after they hit their 156th birthday.

A bit of cash can keep someone off the streets for 2 years or more

If someone is about to become homeless, giving them a single cash infusion, averaging about $1000, may be enough to keep them off the streets for at least 2 years. That’s the conclusion of a new study, which finds that programs that proactively assist those in need don’t just help the victims—they may benefit society as a whole.

U.S. science groups have 20 questions for candidates

A coalition of 56 higher education and scientific organizations has come up with 20 questions whose answers could help voters choose from among Democrat Hillary Clinton, Republican Donald Trump, the Green Party’s Jill Stein, and Libertarian Gary Johnson.

Chemists to get preprint server of their own

Call it a chain reaction. Following the leads of the physics, mathematics, economics, and biology communities, the American Chemical Society announced yesterday that it will start a preprint server for chemistry papers, tentatively titled ChemRxiv.

Now that you’ve got the scoop on this week’s hottest Science news, come back Monday to test your smarts on our weekly quiz!