72 | SCIENCE ILLUSTRATED
Our oldest ancestor
had no eyes. Instead,
its face included
a series of conical
"waste shafts".
Our oldest known
ancestor gave us:
Midline symmetry
Mouth
Bowels
Nerve system
Muscles
JIAN HAN
HUMANS EVOLUTION
72 | SCIENCE ILLUSTRATED
Our oldest ancestor
had no eyes. Instead,
its face included
a series of conical
"waste shafts".
Our oldest known
ancestor gave us:
Midline symmetry
Mouth
Bowels
Nerve system
Muscles
JIAN HAN
HUMANS EVOLUTION