Evolution toward Technology. ASTR 1420 Lecture 5 Sections 6.5, 12.2 . Evolution of Human. Traits of tree life transformed to good human skills Grabbing branches dexterous hands Swinging among branches depth perception good hand-eye coordination
Sections 6.5, 12.2
good hand-eye coordination
Technological evolution :
increased technology new discoveries more advanced technologies …
(lions and gazelles)
streamlined “torpedo-shape” body form
E. A. Widder (Science, 2010, 328, 704)
Bioluminescence has resulted from some intriguing evolutionary adaptations.
All crabs look quite similar… but DNA information tells us that they are from many different ancestors (from shrimps, lobsters, etc.). Crablike body and walking must be an outcome of the convergent evolution.
What’s the benefits of these traits?
Human : 7
Chimpanzee : 3
Dolphins : 2.5-4.5
Hippo : 0.27
Raptors : 5.5
Troodons : 5.8Measuring Intelligence
Factors encouraging intelligence
high, effective metabolism (2% body weight uses ¼ of energy)
long period of parental care (to pass down knowledge)
Natural selection on intelligence
gazelle + lion : mutual pressure
intelligence comes with a cost high metabolism and handling heavy head.Evolution of Intelligence
If only for survival, for given limited resources, other capabilities can be equally good faster running, better fighting, etc.
What about the Woodpecker’s niche?
Need to find an evidence of alien technology on other habitable worlds!
Watch “Smart Monkeys” from PBS NOVA!!
(or search for “Clever Monkeys” in Youtube)