In this issue:
"Brain Cells for Grandmother": Sets of cells encode concepts in the brain.
"Secrets of Primitive Meteorites": Primitive meteorites are helping to give us a better understanding of what our area of outer space once looked like.
"Shattered Ancestry": Fragmented skeletons have upended ideas about the earliest humans.
"The Myth of Antioxidants": The growing evidence that has cast doubt on the popular belief that oxidative damage causes aging.
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