This week, one reader emailed us with a very practical problem. Just how do you work out how far you've run? "What is the easiest and most effective way to measure the distances you're running? I've ...

Google Maps can help you navigate in the real world, but it can also help you determine the distance between points on any map. But don't worry — this doesn't require you to estimate using that scale ...

It’s a bit mind-bending to realise that everything we know about the scale of the universe comes from people stuck […] ...

Open earth.google.com. Go to Tools > Measurement. Click on the starting point. Hover your mouse and click on the endpoint. Head to the Measure pop-up box. To learn more about these steps, continue ...