TANGLED The brain of a person with Alzheimer’s disease symptoms (right) is laden with tau protein (red), while a person with no symptoms (left) has little tau.
Matthew R. Brier
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Magazine
In the Sept. 30 SN: Smog's health woes, secrets of the bat brain, slug slime inspires surgical glue, wild beer, Neandertal tar recipes, the sun's recent flare-ups and more.
Genetics
Topic Image Rail
EMBRYO, INTERRUPTED A 5-day-old human embryo is usually composed of about 200 cells in a hollow ball configuration called a blastocyst (left). Embryos edited to remove the OCT4 gene (right) fail to make normal blastocysts.
K. Niakan/Nature 2017
MICROBE BREWS Scientists are looking for a few good yeasts to enhance beer brewing. Each flask (above) contains the same liquid ingredients and a different kind of yeast.
M. Bochman
