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doing experiments

RESEARCH REDO Scientists repeated some important cancer biology studies, but didn’t always get the same answers. The replication experiments may help explain why some results don’t stand up to scrutiny.

peanuts

New guidelines state that foods containing peanuts are OK to introduce to babies as young as 4 to 6 months old — with certain caveats.

marijuana

HIGH HOPES  Cannabis plants such as this one yield marijuana and other substances that deserve expanded study for possible medical benefits, a large research review recommends. But negative physical and psychological effects of cannabis products can’t be ignored, the report says.

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