Humans
We summarize the week's scientific breakthroughs every Thursday.
- Earth
PCBs may impair fertility
A study of women undergoing in vitro fertilization finds reduced embryo implantation among women with higher levels of one type of the banned chemicals.
- Health & Medicine
How brains guesstimate
Experiments show how the human mind lowballs moving objects’ speed when information is lacking.
- Psychology
Club drug tied to out-of-body sensations
A Canadian survey finds a close link between ketamine and bizarre physical experiences.
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- Humans
U.S. probably began global fire ant spread
A genetic study shows that recent international invasions likely originated in the U.S. South, not the species’ native South American range.
- Health & Medicine
Memories Can’t Wait
Researchers rethink the role of amyloid in causing Alzheimer’s
- Chemistry
Mad cow-type diseases lie in wait
Prion infections build quickly in the brain then pause before killing, new research suggests.
- Health & Medicine
News in brief: Body & Brain
Baby's first bites make a big impression, and so do European biomedical journals, in this week's news.
- Health & Medicine
Tired, sure, but is it from Lyme disease or chronic fatigue?
A scan of proteins in spinal fluid reveals distinct signatures for these two conditions, offering hope for better diagnosis and possibly treatment.
- Humans
Mafia informants fail acid test
Tests of sulfuric acid on pig carcasses cast doubts on Mafia claims of dissolving murder victims in a matter of minutes.
- Health & Medicine
Cell phones may affect brain metabolism
Activity increases near phones pressed to users' ears, a new study finds.
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