LifeHorses remember if you smiled or frowned when they last saw you Horses can remember the expressions on people’s faces and use them to make judgements about whether people are nice or unpleasant ¿ìè¶ÌÊÓÆµ
EarthPlants love carbon dioxide, but too much could be bad for them Most plants were expected to grow more as CO2 levels rise, but a 20-year experiment suggests that the extra CO2 is somehow stunting plant growth, which could make climate change worse ¿ìè¶ÌÊÓÆµ