Latest Science headlines

Spacewalking astronauts pull off urgent station repairs

Spacewalking astronauts completed urgent repairs at the International Space Station on Tuesday, replacing equipment that failed three days earlier and restoring a backup for a vital data-relay system.

‘Evolutionary cousins’ may have lived alongside early humans

A species belonging to the human family tree likely lived at the same time as early humans in Africa, scientists said Tuesday.

Dr. Julius Youngner, 96, polio vaccine pioneer

The inventive virologist’s nearly fatal childhood illness destined him to become a medical researcher and a core member of the team that developed the vaccine.

Gary Steigman, 76, who teased out the universe’s dark secrets

Mr. Steigman’s pioneering studies of the Big Bang helped show that most of the matter in the universe was not made of atoms.

Neanderthals in California? Maybe so, provocative study says

A startling new report asserts that the first known Americans arrived much, much earlier than scientists thought — more than 100,000 years ago __ and maybe they were Neanderthals.

NASA spacewalking suits in short supply, report finds

A new report finds that NASA’s spacewalking suits are in short supply. The suits were developed more than 40 years ago, and a replacement is still years away. That’s despite nearly $200 million spent on new suit technology for Mars and other future space travel.

Instagram

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/12/17/BostonGlobe.com/Metro/Images/a4a68392593311e3a80a0a154a02c3a8_7-7210--90x90.jpg Boston Globe Instagram photos

A live stream of Instagram posts from The Boston Globe photo department.