Ex-CDC director believes COVID-19 escaped from a lab, but cites no evidence By Rachael Rettner Many experts have rejected that theory as unlikely.
What is DNA? By Rachael Rettner DNA is a molecule that contains the instructions an organism needs to develop, live and reproduce.
Pfizer starts COVID-19 vaccine trial in young kids By Rachael Rettner Pfizer is the latest COVID-19 vaccine maker to test its shot in young children.
COVID-19 vaccines are safe and effective in pregnancy, new study shows By Nicoletta Lanese Protection also passes to the fetus through the placenta and to newborns through breast milk.
Lab-grown mini ‘brains’ of humans and apes reveal why one got so much bigger By Yasemin Saplakoglu By growing mini brains in the lab, scientists figured out why human brains grow larger than ape brains.
Meet the 'frodosome,' a brand new organelle By Yasemin Saplakoglu The blob-like organelle drives bone metastasis, but likely also plays a role in the healthy functioning of the cell.
WWII-era stimulant drug discovered in weight loss supplements By Rachael Rettner The drug was one of nine prohibited stimulants found in sports and weight loss supplements.
AstraZeneca COVID-19 vaccine data may be outdated, US safety board says By Yasemin Saplakoglu An independent group of medical experts in the U.S. has raised concerns that AstraZeneca may have released "outdated" data on its COVID-19 vaccine.
How to get pregnant: Tips and facts to increase fertility By Cari Nierenberg, Sarah Wild Here are some tips for how to get pregnant successfully, including information on how to conceive if you have PCOS or endometriosis.
COVID-19 may trigger diabetes in some people By Nicoletta Lanese Scientists don't know exactly why the conditions are linked.
More than 50 new environmental chemicals detected in people By Ashley P. Taylor The vast majority of these chemicals are mysterious compounds with unknown sources.
Woman cries blood tears during menstruation in 'rare and unusual clinical case' By Mindy Weisberger In "a rare and unusual clinical case," doctors described a young woman whose menstrual cycle made her weep tears that were made of blood.
100 million shots in arms: U.S. meets vaccination goal early By Nicoletta Lanese About 41 million people in the U.S. have been fully vaccinated.
5 kids hospitalized with liver failure after drinking ionized 'Real Water' By Rachael Rettner Such water goes through an ionizing process to raise its pH so that it becomes more basic or alkaline.
AstraZeneca vaccine safe, but rare risk of blood clots not ruled out, EU regulator says By Nicoletta Lanese The European Medicines Agency said the benefits of vaccination far outweigh the risks.
Scientists grew human tear ducts in a lab and taught them to cry By Rafi Letzter The glands had no openings so they swelled up like "balloons."
'First complete models' of a human embryo made in the lab By Nicoletta Lanese The model embryos could shed light on early human development.
WHO thinks it knows where COVID-19 originated By Yasemin Saplakoglu In January, a WHO team of experts traveled to China to probe how the deadly pandemic first started.
Why does DNA spontaneously mutate? Quantum physics might explain. By Nicoletta Lanese A phenomenon called "proton tunneling" may explain some DNA mutations, the study authors suggest.
