Lab notes: Hawking's final theory of the multiverse

This week's biggest stories Posthumous publication: / Stephen Hawking's final theory sheds light on the multiverse Life on Mars? / Scientists close to solving mystery of the red planet Dino-toothed seagull / Fossil sheds light on evolutionary journey from dinosaur to bird Private lives / Sex a key part of life for people over 65, study says Come here often? / Plants 'talk to' each other through their roots Notes & Theories / Why genetic IQ differences between 'races' are unlikely From the science blog network Brain flapping / The true secret of happiness? Accepting that there isn't one Head quarters / Nature or nurture: unravelling the roots of childhood behaviour disorders Lost Worlds Revisited / What is geologic time, and how does it work? Head quarters / Sajid Javid and the strange science behind power poses Brain flapping / Why the 'introverts v extroverts' battle helps neither side Podcasts The Guardian's Science Weekly / The curious case of the dodo Eye on science In pictures / Kew Gardens' Temperate House restored After five years, 10,000 plants uprooted and replanted, 15,000 panes of glass replaced, 69,000 sections of metal, stone and timber repaired or replaced, enough scaffolding to stretch the length of the M25, and £41m spent, the largest Victorian glasshouse in the world is ready to open its doors again. The Temperate House in Kew Gardens is once again, as Sir David Attenborough describes it, 'a breathtakingly beautiful space' Where to find us Twitter: @guardianscience | @guardiansciblog Facebook: Guardian Science Guardian News & Media Limited - a member of Guardian Media Group PLC. Registered Office: Kings Place, 90 York Way, London, N1 9GU. Registered in England No. 908396