IN NUMBERS

2,370

The temperature, in degrees centigrade, of an asteroid that smashed into what is now Canada 40 million years ago – the hottest temperature of any object ever known to be on the surface of the Earth.

30 MINUTES

The maximum time period we should be inactive for. Moving for at least a few minutes every half hour can help prolong your life, researchers from the University of Columbia say.

30

The percentage of all of the world’s known plant species that are currently growing in botanical gardens across the globe.