Trivia: The first ancestors of mammals were what type of creature?
Cow
Shrew
Wolf
Weasel
The correct answer is Shrew
So why is this answer correct? : The shrew-like morganucodontids are the earliest-known mammals from which today’s mammals, including humans, descended. They lived among the dinosaurs around 210 million years ago. Although several mammalian lineages existed at the time, morganucodontids are the only ones that survived and gave rise to a species group that became the preeminent animal class on Earth.