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Astronomy

Spying a planet in star’s dusty veil

Astronomers blocked out the light of a nearby star and found hints of an orbiting planet.

Humans

Panel turns critical eye on testosterone

Existing evidence does not justify claims that testosterone treatments can relieve or prevent age-related problems in men, a panel of medical experts has concluded.

Astronomy

Alien stars pass close to home

Stars from an alien galaxy are raining down on our own Milky Way and passing just a few hundred light-years from Earth.

Health & Medicine

Nanoparticles hunt down and kill tumors

Gold nanoparticles, injected into mouse tumors and exposed to light, have been found to destroy cancer cells, a treatment approach that may one day offer an alternative to surgery.