In a study that challenges the conventional wisdom about infections caused by proteins called prions, researchers report that the size of protein structures, rather than their abundance, determines ...

Current evidence suggests that microparticles of cosmic dust collide and stick together to form larger dust aggregates that may eventually combine and develop into planets. Numerical models that ...

Microparticle dust aggregates, which are thought to play a role in the formation of new planets, are less likely to stick together after a collision when the aggregates are larger. Current evidence ...