Scientists solve mystery of how Giant's Causeway was formed

This week's biggest stories Scientists solve mystery of how Giant's Causeway was formed Tests on Captain Cook's sweet potato fuel row over how crop reached Polynesia Man eats world's hottest chilli pepper – and ends up in hospital Evolution / Raising eyebrows: how evolution gave us expressive faces Archaeology / Finger fossil 'shows humans went east of Africa earlier than thought' Agriculture / US gene-editing ruling delights plant scientists Space / 'First luxury space hotel' plans to offer zero gravity living – for $792,000 a night Neuroscience / Neuroscientist Gregory Berns: 'Studying dogs is way more enjoyable than studying humans' Biology / Humans produce new brain cells throughout their lives, say researchers Anthropology / New research sheds light on Neanderthals' distinctive features Evolution / Dinosaur footprints found on Skye From the science blog network Lost Worlds Revisited / The palaeontology of rocks, clocks and zombie lineages Head quarters / Why science is being more open about animals in research Notes & Theories / Africa is slowly splitting in two – but this 'crack' in Kenya has little to do with it Alex Bellos's puzzle Can you solve it? The hipster bicycle race Five bite-sized riddles for you, including a moustache-twiddler about how to get Atticus and Abe on their electronic bikes Podcasts The Guardian's Science Weekly / Alternative medicine and its sceptics A Neuroscientist Explains / How we read words Eye on science The blowhole section / If whales make jazz, what about the rest of the animal kingdom? Scientists are comparing the songs sung by bowhead whales to the music of Thelonious Monk. But from cicada techno to bonobo gabber, they have competition for who's top of the pops 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