Notizie da 5 fonti
Recent experiments suggest that helium-4 atoms can flow through an experimental cell filled with solid helium. But that incompletely understood flow is quite different from the reported superfluid-like motion that so excited physicists a decade ago.
Atmospheric maps and in situ spectrometry of clay minerals constrain climate models and the prevalence of water in the planet’s ancient past.
It’s long been thought that at size scales of tens of nanometers, our genetic material is packaged in a neat, orderly way. New observations show that’s not the case.