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Found a source: https://synapsida.blogspot.com/2011/11/why-marsupials-cant-fly.html https://synapsida.blogspot.com/2011/11/why-marsupials-cant-f...
by plushpuffin 9y ago
Found a source: https://synapsida.blogspot.com/2011/11/why-marsupials-cant-fly.html https://synapsida.blogspot.com/2011/11/why-marsupials-cant-f...
- vanderZwan 9y agoI've heard that the cheetah is considered an evolutionary dead end as well, being so hyper-specialised for speed that they are unlikely to be able to keep up the arms race with their prey, nor able to evolve back out of this.