Buffett back on top

The BBC reports that Warren Buffet has reclaimed the title as the world's richest man. Last year Buffett's wealth increased $10bn to $62bn.

A lot of money, $62bn. But how much is 62 billion (or 62,000,000,000)? Let's look at time-

• 62 billion seconds ago it was the year 42AD - the year that the apostle Paul converted to Christianity and Claudius was emperor of the Roman Empire.
• 62 billion minutes ago was the year 115,952BC - it's difficult to say exactly what was happening in the world this year - history hadn't been invented yet - but generally Homo Sapiens (that's us, modern people) were just evolving in Africa.