By DOUGLAS QUENQUA
A technique which early humans used to make knives by flaking off bits of stone was long thought to have originated in Africa and spread from there, but a new study suggests it arose independently in Eurasia.
Published: September 30, 2014 at 12:00AM
By C. CLAIBORNE RAY
How is the effectiveness of pain relievers measured? Is there a list that quantifies them by strength?
Published: September 30, 2014 at 12:00AM
By JASCHA HOFFMAN
In a piece choreographed by the artist-in-residence at the CERN physics laboratory, dancers will begin with a sort of quantum twerk, a subtle jiggling motion that evokes the vibration of subatomic particles.
Published: September 30, 2014 at 12:00AM
By JAMES GORMAN
Wild marmosets in the Brazilian forest can learn quite successfully from video demonstrations featuring other marmosets, Austrian scientists report.
Published: September 29, 2014 at 12:00AM
By CORNELIA DEAN
A new report from the National Research Council found that the effect of climate change is especially harsh on the United States barrier islands, which are also pressured by rapid development.
Published: September 30, 2014 at 12:00AM
By SAM ROBERTS
A recently declassified report makes it clear that the Manhattan Project was threatened by leaks and espionage, and it reveals a huge blind spot on the government’s part.
Published: September 30, 2014 at 12:00AM
By F. D. FLAM
In Bayesian statistics, new data is used to shape assumptions, the opposite of the frequentist (classical) approach.
Published: September 30, 2014 at 12:00AM
By JUSTIN GILLIS
Five groups of researchers analyzing last year’s Australian heat waves came to the same conclusion: They could not have been as severe without human influence.
Published: September 30, 2014 at 12:00AM
By SANDRA BLAKESLEE
Citizen scientists are hunting sprites, majestic emanations of light that flash for an instant high above storm clouds, whose effects on the physics and chemistry of the atmosphere remain an open question.
Published: September 30, 2014 at 12:00AM
By CARL ZIMMER
Viroids, naked loops of RNA, attack crops and other plants today, but new research suggests they existed at the earliest stages of life on Earth.
Published: September 25, 2014 at 12:00AM
By KENNETH CHANG
Researchers found that university science professors widely regard female students as less competent than male ones.
Published: September 25, 2012 at 12:00AM
By BENEDICT CAREY
New research suggests violent games can stir hostile urges and aggressive behavior in the short term, but it is not clear whether the habit increases the likelihood of committing a violent crime.
Published: February 12, 2013 at 12:00AM
By DONALD G. McNEIL Jr.
The Obama administration on Wednesday issued new guidelines intended to strengthen oversight of federally funded research that could inadvertently produce biological weapons.
Published: September 25, 2014 at 12:00AM
By THE ASSOCIATED PRESS
Ice in Arctic waters shrank this summer to the sixth-lowest level in 36 years of monitoring, the National Snow and Ice Data Center reported Monday.
Published: September 23, 2014 at 12:00AM
By CLAUDIA DREIFUS
Answers from two dozen scientists, authors, and world and national figures.
Published: September 23, 2014 at 12:00AM
By JUSTIN GILLIS
“Years of Living Dangerously,” an Emmy-winning documentary series about climate change that ran on Showtime this summer, is now available on streaming services and on DVD.
Published: September 23, 2014 at 12:00AM
By JUSTIN GILLIS
A new paper based on top climate models says that by about 2047, average temperatures across the globe will be higher than any highs recorded previously, with tropics hit earlier.
Published: October 10, 2013 at 12:00AM
