sciencenews.org

KO04G Protons are made up of even smaller particles called quarks, so you might expect that simply adding up the quarks’ masses should give you the proton’s mass. However, that sum is much too small to explain the proton’s bulk. And new, detailed calculations show that only 9 percent of the proton’s heft comes from the mass of constituent quarks. The rest of the proton’s mass comes from complicated effects occurring inside the particle, researchers report in the Nov. 23 Physical Review Letters.

yQePp Crested pigeons have specialized feathers that signal danger when they flee from an apparent threat.

e0woE Microbial life in Chile’s Atacama Desert bursts into bloom when moisture is available.