This is a digest of the stories posted to newscientist.com from 6pm yesterday until 6pm today. We’re running it as an experiment. Did you find it useful? Do you have suggestions about how we can make it better? Let us know. You can now subscribe to these digests by RSS Sedatives may slow recovery from trauma Giving sleeping pills to soldiers and earthquake victims is common practice, yet it could be doing more harm than good Cosmic rays reveal erupting volcano’s guts Subatomic particles reveal how much magma was blasted out of a volcano in Japan Our ancestor Ardi walked tall The bones of a 4.4-million-year-old relative suggest that she walked upright. See more family snaps in our Gallery Free-flying cyborg insects steered from a distance A live beetle with electrodes wired up to its nervous system can made to take off and be steered like a remote-controlled aircraft Asian quake could trigger California’s big one Powerful earthquakes 700 and 8000 kilometres away are known to have weakened the San Andreas fault Monsters of the skies: giant beasts that ruled the air A huge eagle that once haunted New Zealand’s forests was a fierce predator that may have hunted humans – see our gallery of other ancient airborne behemoths Galaxy study hints at cracks in dark matter theories More than two dozen galaxies of all shapes and sizes show the same ratio of dark matter to normal matter in their central regions – current theories can’t explain why Did Samoa quake trigger Indonesia disaster? Two major quakes struck the Pacific region yesterday – were they related?