One's temporary, the other is often built in. A bad night's sleep is far from the only reason we can get eye bags or dark circles. Breakthroughs, discoveries, and DIY tips sent every weekday. Whether it was caused by a night out with friends, a crying baby, or plain old insomnia, we all know that lack of sleep affects our bodies. In addition to fatigue and a yearning for coffee, poor sleep can leave us frowning at the dark, swollen circles under our eyes.

We're all regularly reminded that we should be getting at least seven hours of sleep every night. But whether it's laying awake with stress or being kept up by the children, in reality, many Britons get significantly less than this. Now, experts have warned that your face could be paying the price. Sleep tech firm Simba has used AI to reveal what can happen to your face if you don't get enough sleep. From dark circles to extra wrinkles, the images may serve as a reminder of the importance of getting a decent kip.

You've probably been wowed or even concerned by the advances in artificial intelligence recently -- but now prepare to be insulted. Longevity experts in New York City have developed an AI tool that estimates the age of your face based on a selfie photo. The face is a window into how fast the rest of the body is aging, with smoking, alcohol and pollution all draining nutrients from the skin, leading it to lose elasticity and develop wrinkles faster. A bad diet can also age the face by boosting inflammation, which can also contribute to wrinkles. Above are two individuals who have used the tool.