A study of more than 10 million siblings suggests that firstborns are more likely to be autistic and have allergies, while conditions like migraine and shingles tend to affect their younger sibling

Removing CO2 from the atmosphere by capturing the carbon from burning biomass is supposed to save the planet, but it looks like the flagship project will never happen

Some gut bacteria recycle discarded sex hormones, like oestrogens, back into the body. The level of these bacteria seems to be higher in industrialised societies, which could have big implications for our health

A small comet has been spotted slowing down and then speeding up again – but in the opposite direction, which we have never seen before

If the Atlantic Meridional Overturning Circulation shut down, the knock-on effects could release hundreds of billions of tonnes of CO2, raising global temperatures even further