Latest Science headlines

Scientists say US role in curbing pollution is key to earth’s future

Earth is likely to reach more dangerous levels of warming even sooner if the U.S. retreats from its pledge to cut carbon dioxide pollution, scientists said. That’s because America contributes so much to rising temperatures.

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.

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