A new tooth-regrowth drug from Japan cleared an early safety trial and could offer an alternative to implants and dentures.

"Human children grow at a uniquely slow pace by comparison with other mammals. When and where did this schedule evolve? Have technological advances, farming and cities had any effect upon it?

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Scientists have grown a tooth in a lab, marking a significant step ...

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