How Google Earth Mapped 98% of the World

And how it overcame device constraints to bring it to you

Google Earth image of the lakes in the Great Sandy Desert, Australia. Source: Pandotrip

Saroo Brierley was five years old when he was separated from his parents. He and his older brother, Guddu, took a train from their home to a city 70 km south. Saroo fell asleep on a bench at the station and when he woke up, his brother was gone.