Genetic screening may lead fertility clinics to discard healthy embryos
Doctors are still trying to make sense of the recent rise in cases
Medicare has declined to pay for the controversial Alzheimer’s drug Aduhelm
Drug effectiveness has morphed along with the coronavirus strains, and not all patients are eligible for prescriptions
Some researchers question the scientific basis for the environmental agency’s latest air quality proposals
The BA.2 strain appears more contagious but may not be more severe
Using DNA from 3,609 individuals, scientists map out an ancestral genealogy for the human race
Some hospitals are denying transplants to patients who haven’t received COVID-19 vaccines, but bioethicists say the policy is justified
Nonrandom mutations threaten Darwinian orthodoxy
The James Webb Space Telescope is set to peer further into space than Hubble ever could
