Beneath the brain’s inner sanctums, an enigmatic cerebrospinal fluid (CSF) bathes neurons with mystery, delivering nutrients and clearing away waste products while quietly affecting mental well-being. Scientists have long believed the fluid is nothing more than an inert cushion for decades. But a new study now uncovers it as a front line where immune cells ...
Every night-shift nurse who feels wired at 3 a.m., every teenager who cannot fall asleep before midnight, every traveler stumbling through jet lag is bumping up against the same invisible force: the body’s internal clock. For decades, this clock was treated as a kind of biological background noise, a curiosity more than a cornerstone ...
Somewhere between your childhood reflection and the face you see in the mirror today lies one of biology’s greatest riddles: why do we age at all? For most of human history, wrinkles, gray hair, and aching joints were treated as an unavoidable blur called “getting old,” not a process with precise molecular gears and ...
