We all know the sweet relief that comes from scratching an itch. But why does scratching feel so good? And why does it make the itch worse? Why so itchy? An itch is simply a sensation on the skin leading to the desire to scratch. But the science of itching is far from simple – it’s been the subject of decades of research (there’s even a scientific research journal called Itch). Researchers discovered the first […]
Most animals do it. You’ve been doing it since before you were even born. And it’s quite likely looking at these photos has made you do it now. Yawning. But why do we yawn and why is yawning so contagious?