Biology
Adaptive radiation of cichlid fishes in African rift lakes
Quick fact
Lake Victoria's cichlids may have diversified from just one ancestral species into over 500 species in as little as 15,000 to 100,000 years, making them one of the fastest known adaptive radiations.
Why this is interesting
Imagine a lake where hundreds of fish species, unique to that lake, didn't exist a few thousand years ago. How could so many species evolve so quickly from a single ancestor?