News

Astronomy

Triple Play: A planet with three suns

Three suns grace the skies above a newly found, Jupiterlike extrasolar planet, posing a puzzle for how massive planets form in a closely-knit, multiple-star system.

Physics

Realistic Time Machine? New design could forgo exotic ingredient

A novel time machine concept may avoid a problem of earlier, less-practical proposals by requiring only normal matter and the vacuum known to exist in space.

Earth

Pollution Ups Blood Pressure: Inhaled particles linked to transient effect

In a laboratory setting, volunteers breathing pollutants generated by sources such as vehicle engines experience slight but steady increases in blood pressure.