Europe may be the smallest continent, but it has no shortage of fascinating places to visit. From incredible castles to ...

The map below shows the location of London and Sydney. The blue line represents the straight line joining these two place. The distance shown is the straight line or the air travel distance between ...

More than half of the world's people live in cities. By 2050, it will be nearly seven in ten. Cities account for more than 70% of global carbon emissions and 60-80% of energy consumption. Rapid ...