speciation
The evolutionary mystery of the German cockroach
The species evolved to exploit human-built environments and exists nowhere else. So where did it come from?
![A cockroach poised on a rock](/content/images/size/w1460/2024/06/erik-karits-CAgEXn8iFZc-unsplash.jpg)
When did human chromosome 2 fuse?
More and more, it looks like this event happened shortly before a million years ago, in the common ancestors of Neandertal, Denisovan, and African ancestral humans.
![When did human chromosome 2 fuse?](/content/images/size/w1460/2023/08/chromosome-2-telomere-fluorescence-hybridization-image-ijdo-1991.jpg)