Sleeping on their left sides keeps the right side of cats' brains alert and ready to detect immediate threats, scientists say ...

They found that people who usually sleep on the left side of the bed are 4% more inclined to wake up in a good mood and nearly 10% more likely to have a positive outlook on life.

Most cat owners know their pets spend a lot of time asleep, but fewer realize how they sleep might matter. A recent study looked at over 400 videos and found that cats aren’t just napping at random.

The left atrium is one of the four chambers of the heart, located on the left posterior side. Its primary roles are to act as a holding chamber for blood returning from the lungs and to act as a ...

Cats prefer to sleep on their left side. This is the conclusion drawn by an international research team that analyzed several hundred YouTube videos of sleeping cats. The researchers see this bias ...

One thing you may have noticed is that your cat likes to sleep on their left side when they’re in one of the best cat beds or snoozing on the couch. A new study has found that cats prefer to sleep on ...

Credit: Current Biology (2025). DOI: 10.1016/j.cub.2025.04.043 Perceiving dangers with the left visual field brings advantages The group analyzed 408 publicly available YouTube videos in which a ...

Parkinson’s disease often begins asymmetrically, affecting either the right or left side of the body first. Researchers from the University of Geneva (UNIGE) and the Geneva University Hospitals (HUG) ...