Asphalt roofing shingles, especially dark ones like those shown here, can get scorching hot on summer days. Then they'll also shed some of that heat into buildings. A new coating can help shingles reflect more of the sunlight that heats them up. And that could cut home cooling bills.
A flash of lightning is accompanied by loud cracks of thunder. Now scientists have mapped how that sound develops.
Neil Armstrong (right) seen wearing his pressure suit on the lunar surface July 20, 1969. That moon suit, now a prized artifact in the Smithsonian Institution’s collection of space wear, is deteriorating. Museum scientists are working hard to limit further damage.