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Lab-grown brain organoids

ON THE BRAIN  Lab-grown brain organoids (one shown) mimic the real thing, analyses suggest. Along with other parts of a large research effort called PsychENCODE, the organoid results may offer new clues about psychiatric diseases such as schizophrenia.

South American maize varieties

COMPLEX MAIZE  Modern corn plants, such as these South American maize varieties, were domesticated over a surprisingly long period across a broad geographic area after a partly domesticated form originated in Mexico around 9,000 years ago, a new genetic analysis concludes.

Nine-banded armadillo

SCALY SCIENCE  Nine-banded armadillos have their offspring four at a time, each genetically identical. But scientists now know that identical DNA isn’t everything.

Amyloid-beta illustration

BRAIN BUILDUP  Amyloid-beta (illustrated in brown) from vials of contaminated growth hormone spread in the brains of mice, researchers found.

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