Hawk’s invisible force shield protects hummingbird from jays
Small birds can be protected from a predator by the presence of an even bigger predator, which creates a no-go zone
Armchair fossil hunters use drone photos to find ancient bones
A citizen science project is seeking volunteers to scour photos of Kenyan rocks in a bid to reconstruct past landscapes and environments
Spider galaxies spotted eating gas caught in the cosmic web
We've long thought that galaxies grew fat by devouring gas from a mesh of dark matter called the cosmic web – now we've seen it in action
Climate change could submerge rocket launch sites, warns NASA
Over two-thirds of NASA's infrastructure lies at elevations within 5 metres of sea level, and some sites may have to be abandoned as oceans rise
Faster Tube trains in London could make your commute even longer
Modelling shows that speedier trains can create more congestion on the roads, so new lines like Crossrail could make traffic worse
Stonehenge mystery deepens with discovery of 30 new stones
Remote sensing surveys have revealed a vast monument near Stonehenge: it had up to 90 enormous stones in a horseshoe shape half a kilometre wide
HIV may kill majority of cells by a method overlooked for years
Viruses pumped directly into cells may kill the most crucial white blood cells in people with HIV, which could make developing a vaccine even harder
Everyone in the US and Australia owes $12,000 in CO2 emissions
If we view above-average carbon emissions as a cost to the planet, then people in rich nations have "borrowed" large sums from the poor since 1990
Alzheimer’s may have been transmitted via human growth hormone
A controversial study suggests that Alzheimer's can be transmitted between people – but not everyone is convinced
Alzheimer’s may have been transmitted via human growth hormone
A controversial study suggests that Alzheimer's can be transmitted between people – but not everyone is convinced
