This week in science

Martian carbon signatures and more: Understand the world through 7 images

NASA

© German Archaeological Institute, Berlin (Germany)

NASA’s Curiosity rover found possible hints of ancient biological activity on Mars the week of January 12–19, as researchers uncovered ancient animal hybrids and worrying climate trends on Earth.

Here are the week’s biggest science stories, told in 7 stunning images.

NASA/Caltech-JPL/MSSS