After fifty years of research, scientists have finally unraveled the molecular mechanics of the bacterial flagellar motor. This sophisticated biological machine allows single-celled bacteria to swim toward nutrients or tumble randomly to find new directions. Recent breakthroughs using cryo-electron microscopy have revealed how protein stators act as turnstiles, driven by a constant influx of protons known as the proton motive force. This mechanism converts entropic energy into kinetic rotation, providing a fundamental look at the physical forces that power cellular life.
A recent study by Harvard scientists reveals the connection between gut bacteria and their role in inflammation and depression. The research highlights how certain bacteria can influence mental health and inflammatory responses, offering potential new avenues for treatment.
The clearest picture yet of LUCA suggests it was a relatively complex organism living 4.2 billion years ago, a time long considered too harsh for life to flourish.
