From electrons that flow like water inside graphene, to printed neurons that can talk to living brain cells, this week has been packed with discoveries that blur old boundaries — between physics and chemistry, biology and engineering, and even between the artificial and the alive. Here are six stories worth sharing in the lab, the classroom and the staffroom.

From a black hole erupting like a cosmic volcano to a 300-million-year case of mistaken identity, this week's science news spans the universe — and the microscope. We've got breakthroughs in weight loss, male contraception, whale conservation, and even the secrets hidden in your DNA

From a single injection that restores hearing to an AI system that thinks 100 times more efficiently, this week’s science stories are full of surprises. We also visit Mars, peer inside the ageing brain, watch ancient carbon spill from melting permafrost, and discover how sugarcane might save your teeth.

From a historic Moon launch to a collapsing freshwater migration and a QR code smaller than a bacterium, this week's science headlines span the cosmos to the nanoscale. Meanwhile, chemistry labs delivered two surprise discoveries, and a new study reveals that female mantises pack a surprisingly powerful punch.