Are deer color-blind or not?“Deer are essentially red-green colour blind like some humans. Their colour vision is limited to the short [blue] and middle [green] wavelength colours. As a result, deer likely can distinguish blue from red, but not green from red, or orange from red.”
How long does a caterpillar stay in a cocoon?
The process from egg to butterfly is weather dependent and also depends on the regional climate. It can take about four weeks to the peak of the summer in warmer climates. The egg takes 5 to 10 days, the larva/caterpillar and pupa/chrysalis each takes about 10 to 14 days.
How many feet per second does a bullet go?
Firearms expert Julian Hatcher studied falling bullets in the 1920s and calculated that.30 calibre rounds reach terminal velocities of 300 feet per second (90 m/s). A bullet travelling at only 200 feet per second (61 m/s) to 330 feet per second (100 m/s) can penetrate human skin.
When were braces invented?
Orthodontic braces weren’t invented until the early 1800s, but people’s preoccupation with straight teeth, and/or proper jaw alignment dates back to the time of the ancient Egyptians.
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