Rigged dice have been modified in a manner to increase the changes of it falling with a particular number on top
There is evidence that gambling started as long ago as 3000 BC. A pair of six-sided stone dice was discovered in an Egyptian tomb. Read more about the history of gambling.
Rigged dice are not really prevalent these days, especially in casinos. The dice you see in the image on the left are transparent so any tampering would be plain to see.