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Plants

Big genetics study blazes path for bringing back tomato flavor

Combining taste tests with genetics suggests what makes heirloom varieties tastier than mass-market tomatoes.

Physics

New claim staked for metallic hydrogen

Scientists report transforming hydrogen into a metal at high pressure, but some experts dispute the claim.

Life

Mouse cells grown in rats cure diabetes in mice

Mixing cells of two species produces pig and cattle embryos with some human cells.

Tech

Legos inspire versatile fluid-filled devices

Tiny devices shuttle fluid around using reconfigurable Lego-like bricks.

Health & Medicine

50 years ago, methadone made a rosy debut

Heralded as the “answer to heroin addiction,” methadone is still used to treat opiate addiction, despite risks.