Medicine
Brain-Invading Tapeworm That Eluded Doctors Spotted by New DNA Test
Genetic sequencing of spinal fluid hailed as an advance over standard procedures for diagnosing brain infections
Chemistry
Sphere Made to Redefine Kilogram Has Purest Silicon Ever Created
Engineering
Quick-Thinking AI Camera Mimics the Human Brain
Evolution
Reverse Engineering Mysterious 500-Million-Year-Old Fossils That Confound Our Tree of Life
Evolution
Evolution
DNA Points to Multiple Migrations into the Americas
Public Health
Public Health
Is the Senate Health Care Plan "Mean"?
Biology
Biology
Big Pacific: Photos From One of Earth's Great Oceans
Energy
Energy
Energy CEOs Tell EPA Chief They Want Carbon Regulation
Behavior & Society
Behavior & Society
Teen Pregnancies Down as More Adolescents Use Contraception
Most Popular
Elon Musk Publishes Plans for Colonizing Mars
The billionaire entrepreneur and founder of SpaceX wants to make humanity a "multi-planetary species”
China Shatters "Spooky Action at a Distance" Record, Preps for Quantum Internet
Results from the Micius satellite test quantum entanglement, pointing the way toward hack-proof global communications—and a new space race
Why Are so Many Babies Born around 8:00 A.M.?
Data visualization engineer Zan Armstrong takes a close look at human birth patterns.
Are You a Magnet for Mosquitoes?
Researchers are studying the way twins smell for clues about the genetic basis of insect appeal
Science Calls Out Jeff Sessions on Medical Marijuana and the "Historic Drug Epidemic"
Rolling back protections from federal interference in state legalization laws could worsen the opioid overdose crisis
Why I Won't Get a PSA Test for Prostate Cancer
Physicians are still recommending the blood test for prostate cancer even though it harms far more men than it helps
Special Report
Science and the Trump Presidency
Policy & Ethics
What to expect for climate change, health care, technology and more under the new administration
Infographic of the Week
Videos
Chimps Engage in Costly Quid pro Quo
Chimpanzees have been known to cooperate when there is no foreseeable personal cost. Watch and learn whether chimps are capable of riskier, more complex forms of collaboration.
