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Malcolm Ritter

Link between teen pot use, IQ decline questioned by study

NEW YORK—A new analysis is challenging the idea that smoking marijuana during adolescence can lead to declines in intelligence.

Instead, the new study says pot smoking may be merely a symptom of something else that’s really responsible for a brainpower effect seen in some previous research.

It’s not clear what that other factor is, noted Joshua Isen, an author of the analysis.

Cave bone trove reveals a new human ancestor

MAGALIESBURG, South Africa—Scientists say they’ve discovered a new member of the human family tree—revealed by a huge trove of bones in a barely-accessible, pitch-dark chamber of a cave in South Africa.

The creature shows a surprising mix of human-like and more primitive characteristics—some experts called it “bizarre” and “weird.”