This is because we are complex and intricate beings and we all come from different ancestors and backgrounds. (fitlife.tv)
And, he points out, bird species with different ancestors may develop similar looks and behaviors. (sciencenewsforstudents.org)
A new study involving biologists from Monash University Australia has found that despite their very different ancestors, dolphins and crocodiles evolved similarly - shaped skulls to feed on similar prey. (sciencedaily.com)