Latest Issue 27 May 2016 Latest Issue 27 May 2016 Artist’s impression of a possible supermassive black hole seed.NASA / CXC / M. Weiss NewsSpace Monster black holes may be behemoths from birth They start big and grow at a normal rate: study. by Belinda Smith News Life Sciences Superbug resistant to last resort antibiotic by Bill Condie 'We risk being in a post-antibiotic world.' News Life Sciences Harbour porpoise catches 90% of fish it hunts by Amy Middleton They're among the best hunters in the world. News Earth Sciences Did a climate fluctuation save Europe from the Mongol hordes? by Jake Port Scientists may have solved a mystery. News Life Sciences New evidence supports asteroid theory of dinosaur extinction by Amy Middleton The poles were no safer than the rest of the planet. Feature Space Colourful Mars, weightwatching meerkats and an ice-scoured Caspian Sea by COSMOS editors Our top five science-related pictures of the week.