Utah State University Eastern provides life-changing experiences for students in all stages of life. Let USU Eastern transform your life for good.
Maintained by pioweb@ucsc.edu. The common ancestor of placental mammals probably looked like Eomaia scansoria, the earliest known placental mammal, shown here in an artist's reconstruction based on a 125-million-year-old fossil skeleton found in China in 2002.aintained by pioweb@ucsc.edu. The common ancestor of placental mammals probably looked like Eomaia scansoria, the earliest known placental mammal, shown here in an artist's reconstruction based on a 125-million-year-old fossil skeleton found in China in 2002.
The first homonids (animals from the same genus as people) evolved about 3 million years ago. Our species, Homo sapiens, evolved about 200,000 years ago.umans, chimpanzees, gorillas and orangutans share an earlie â¦ r still common ancestor. These great apes and the gibbons of the Hylobatidae share an even earlier common ancestor. That is how evolution works, by common ancestry, the pattern of phylogeny tracing this out.