Pretend for a minute that you can’t breathe. Like, you just don’t have lungs anymore. You are some bizarre evolutionary oddity — a huge, human-shaped organism that doesn’t have a respiratory system. Instead, you get all of your oxygen the way that your oldest, smallest evolutionary ancestors did — by simple diffusion.
Microbiology Crash Course, History of Science #24: What makes beer? Single-celled organisms. What makes us cough and feel like sleeping for twelve straight hours Straight? Single-celled organisms; AKA microbes, germs, the tiny machines that allow us to digest—and can kill us. “What is life?” It turns out, life is relentless, everywhere on earth! Microbes are…
Microbiology, a brief history part 2: He hypothesized that microbes are everywhere and must be responsible for all kinds of phenomena, like making food spoil. So in 1865, he patented a process in which liquids such as milk were heated to a temperature between sixty and one hundred degrees Celsius in order to kill microbes….