Microtubule Memes

That strutting orange protein is kinesin, the FedEx delivery guy of your cells. This molecular motor literally walks along microtubule highways carrying cellular cargo like it's late for a meeting. Running on ATP fuel, it takes these adorably awkward steps at about 100 nanometers per second. Nature invented bipedal locomotion billions of years before humans thought they were special for standing upright. The cellular world has better transportation systems than most major cities, and they never complain about traffic.