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the environment limited some traits and allowed for others; you (most likely) have three flavors of color cones in your eyes not four like birds(dinosaurs) an
by tejtm 4y ago
the environment limited some traits and allowed for others;
you (most likely) have three flavors of color cones in your eyes not four like birds(dinosaurs) and replies because the having more rods (B/W low light sensitive) was better suited to night survival. On the other hand our brains do not (usually) have a bone partition between the two halves because we did not need to sleep with one eye open underground.
- elevaet 4y agoYes, apparently chickens (and other birds) really can sleep one half of their brain at a time. In chickens, the ones roosting on the edge of the flock keep their outside eye open and sleep the other side of the brain.
- anubiskhan 4y agoDolphins and whales as well https://www.scientificamerican.com/article/how-do-whales-and-dolphin/ https://www.scientificamerican.com/article/how-do-whales-and...