PhysicsQuantum 'arrow of time' suggests early universe had no entanglement One way to explain why time only moves forward is the quantum arrow of time, and it has major implications for both the universe's early period and its eventual demise ¿ìè¶ÌÊÓÆµ
PhysicsDoughnut-shaped swirls of laser light can be used to transmit images Ultra-fast pulses of laser light can be shaped into vortices similar to smoke rings – when chained together, they can carry enough information to transmit a simple image ¿ìè¶ÌÊÓÆµ