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.
TINY BUBBLES Cooking up Earth’s first life probably required many “pots.” Spatial segregation into different pools or separate droplets might have helped the first self-replicating molecules survive. Later, protocells like those shown here provided more stable compartmentalization.
Richard Bizley/Science Source
MISMATCHED OFFSPRING When macaroni penguins convene at a breeding site (shown), females lay some of the most size-mismatched eggs known among birds.
EXTRA EXTRA An extra chromosome can help suppress the effects of cancer mutations, new research suggests. The findings may help explain why people with Down syndrome, who have an extra copy of chromosome 21 in their cells, have low cancer rates.