Top stories: Rosetta’s comet results, the genes behind big brains, and the Doomsday Clock
(left to right) OSIRIS; Andrew Tran for the ENIGMA Consortium; Biophoto Associates/Science Source

Top stories: Rosetta’s comet results, a new drug that stops cancer spreading, and the Doomsday Clock

Eight genes that make us brainiacs

When it comes to certain parts of your brain, bigger is definitely better. Now, scientists have pinpointed eight genetic variations that help determine the size of key brain regions that influence everything from memory to motor control.

By 98 to 1, U.S. Senate passes amendment saying climate change is real, not a hoax

This week, the U.S. Senate voted overwhelmingly—98 to 1—to approve an amendment affirming that climate change is real and "not a hoax." But they still can't agree on whether humans are causing it: Although two other measures declaring that humans contribute to climate change got a majority of votes, they fell short of the 60 votes needed to be adopted by the Senate.

Nanoparticle drug stops cancer’s spread in mice

When a person dies from cancer, the culprit usually isn't the original tumor—it's metastasis, the spread of cancer cells throughout the body. Now, researchers have managed to package a drug in nanoparticles so that it can target these cancer cells without interfering with normal cells—and report that they've stopped cancer cells from spreading in mice.

Ten new Rosetta images that reveal comet 67P in all its glory

This week, Science published the first scientific results from Rosetta at comet 67P, including discoveries from Rosetta’s main science camera, OSIRIS. Images like these reveal 67P to be a far more diverse place than anyone expected.

Physicists read scrolls scorched by ancient volcano

In 79 C.E., Mount Vesuvius erupted, destroying the city of Pompeii—and a nearby library filled with scrolls. Archaeologists have been trying to unroll these scorched scrolls since the 1750s, but the risk of damage was just too high. Now, physicists have figured out how to read them using high-powered x-rays.

Bulletin of the Atomic Scientists moves Doomsday Clock 2 minutes closer to midnight

The board that runs the Bulletin of the Atomic Scientists has decided to move the minute hand on its symbolic Doomsday Clock 2 minutes closer to disaster. The clock now shows 3 minutes before midnight because the “probability of global catastrophe is very high” as a result of continuing climate change and efforts to modernize nuclear weapons stockpiles.