SpaceSample of asteroid Ryugu brought to Earth is a strange dark colour Last year, Japan’s Hayabusa 2 asteroid explorer returned samples from the asteroid Ryugu, and now the first analysis of the rock shows it has a primitive composition and a curiously dark colour ¿ìè¶ÌÊÓÆµ
PhysicsWhy does time only move forwards? Possibly just because we’re ignorant The one-way flow of time is one of the great mysteries of physics. It might be that we see causes and effects just because our information about reality is incomplete Features