In the March 4 SN: Search for sustainable catalysts, deflating cancer’s defenses, species miscounts, frog spit secrets, an acrobatic bat robot, coconut-cracking crabs, baffling X-ray bump, neutron’s elusive lifetime, Zika’s baby photo and more.
PREHISTORIC PREGNANCY With a long-necked body not suited to walking, an ancient marine reptile Dinocephalosaurus (illustrated) may have evolved to give live birth in the ocean rather than lay eggs on land, a new study suggests.
Dinghua Yang, J. Liu
HORSE RACE As ancient horses rapidly diversified into new species, drastic changes in body size didn’t occur, despite the diversity found in the fossil record, a new analysis shows. (Three species from roughly 8 million years ago are shown.)
MOUTHING OFF New fossils show tiny creatures with accordion mouths (one shown) that lived 540 million years ago. The animals are the earliest known deuterostomes, a category so big it includes everything from humans to starfish.