Add Yahoo as a preferred source to see more of our stories on Google. A record-breaking Christmas tree attracted so many visitors that the National Trust was forced to turn away people arriving by car ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

a Spatial pattern of tree numbers within a 0.01° grid. b Latitudinal distribution of tree density and total tree numbers, with shaded areas indicating the standard deviation of the estimated tree ...

A record-breaking Christmas tree attracted so many visitors that the National Trust was forced to turn away people arriving by car. Visitors have been flocking to see a 44.7 metre high (147ft) giant ...