In the Dec. 10 SN: Star-starved galaxies, animal math, Parkinson’s roots in the gut, supersolid success, Celebrex’s controversial heart risk, a prionlike memory protein, yo-yo dieting’s downside, blue begonias and more.
QUICK DRAW Chemically reactive molecules called reactive oxygen species spur embryo cells to assemble a drawstring-like apparatus to close wounds, fruit fly research suggests.
GUT IMPULSE Signals from gut microbes can activate immune cells called microglia (shown here in green) in the mouse brain, causing inflammation that’s characteristic of Parkinson’s disease.
FREAKY FUTURE Is silicon-based life (illustrated above) out there in the universe? The jury is still out — but with a little help from humans, life on Earth might be able to sprinkle a little silicon in with its carbon.
Lei Chen and Yan Liang (BeautyOfScience.com) for Caltech