Urban foresters in the Ugandan capital are assessing tree numbers and health, as the city expands its tree cover to beat the heat and improve air quality. The richest content creators in the world The ...

Real life situations such as travelling over time and across distance can be drawn on a graph. Exact distances and times are plotted on the graph. These are shown as co-ordinates. These points are ...

It’s been a long time since Alice Charton got a good look at a human face. There are plenty of people moving through her world, of course—her husband, her friends, her doctors, her neighbors—but ...