299,792,458 Meters per Second

299,792,458 Meters per Second is an Earth Badge (a Sun Badge before it's revision in spring 2011) that can be earned for getting 75 skill problems quickly correctly in a row.

How to get this badge
To get this Badge, answer 75 skill problems quickly and correctly in a row. Without any wrong

Trivia
Before spring 2011, 299,792,458 Meters per Second was a Sun Badge, but as more easy excercises came along, it got changed from a Sun Badge into an Earth Badge.