Liquid water found on Mars, the tongues of long-tongued bumblebees are shrinking, four kinds of gut bacteria linked to asthma, volcanoes may have contributed to the dinosaur extinction, and The Martian gets favourable reviews.

Dawn arrives at Ceres, large carnivores practice population control, #TheDress, Titan could have life unlike anything on Earth, Russia pulls out of the ISS and emulsifiers affecting gut microbiome.