You wake up to your partner telling you that you had an entire conversation with someone named Bob last night, or your roommate mentions you were giving what sounded like a presentation in your sleep.

Sleep talking (also know in the sleep field as "somnliloquy") is a sleep disorder that involves unconscious talking during sleep. Sleep talking varies in its content and presentation, ranging from ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

You’ve likely experienced it – waking to find your partner urgently informing you that you spent half the night having an animated conversation with no one. Or perhaps you’ve been the one awakened by ...