This incredibly detailed fossil shows individual chromosomes splitting — courtesy of a mini-catastrophe 180 million years ago (newscientist.com)
Back in the lab, they performed a technique known as a chromosome squash — squeezing the butterflies» cells between thin films of glass until individual chromosomes are visible under a microscope — counted to 30, and published the results. (sciencemag.org)
Remarkably, individual chromosomes remain separate entities during mitosis, whereas many other polymeric assemblies fuse with each other upon contact in a liquid - like manner. (embl.de)