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Then and Now: CO2 Levels

Paleocene mammals, such as ancestors of modern-day horses, were as small as common day housecats. Due to the rising heat, ectotherms, also known as cold-blooded animals, needed a bigger surface area to regulate their heat, so the bigger ectotherms were the winners and survived.

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How To Be A Student Lab Rat

At first, I was underwhelmed; it just looked like eight horizontal lines on different sections of the screen. But when the operator told me to focus on one line and move my eyes left and right, the line dramatically shifted up and down. Then my focus shifted to another line that oscillated every time I blinked, and finally, when I ground my teeth, I saw every line on the screen scatter into clouds of multicolored dots all blending together.