You may have heard the phrase “you are what you eat”, but some scientists are tracking the evolution of new diets in orchids by taking the phrase literally.
A polysaccharide found in the cell walls of land plants has now been found outside the cell. This chemical, Xyloglucan, could be one of clues as to how plants moved onto land.
There is a huge demand for long-term climate data, and tree growth rings could help with that, but an article in Quaternary Science Reviews warns there should be some caution using the data, as not all rings are the same.