Scientists are aware of how cats purr but they still can't find the answer to why cats purr. One of the more surprising explanations is that cats don’t just purr when they are happy and relaxed, they also purr when they are in pain. But this is not proven to date.
Scientists are not sure why we yawn and that too daily. The scientific community has moved toward the idea that yawning is a thermoregulatory behaviour that cools down the brain, but its true biological function is still unclear.
Yes, tomatoes have more genes than humans. Tomato may not look as complex as a human but it takes around 7000 more genes to make one than it does a human being. It has some explanations but none of them are proven yet.
There is no cure for Alzheimer’s, a disease that causes dementia. For years, the prevailing theory has been that Alzheimer’s is caused by pile-ups of proteins which effectively create plaques in the brain.
Many species of birds migrate over incredibly long distances in order to lay their eggs or escape harsh winters. Scientific theories that birds use the stars or Earth’s magnetic field to navigate, fail to cover how it is possible for birds to locate the exact coordinates of an area, without ever having visited them before.
The brain is an incredibly powerful thing, and scientists are only beginning to touch the tip of the iceberg. One of the things they can’t explain is this placebo effect, which not only works for pills but also, incredibly, for surgery.
It’s widely accepted that the reason ice is so slippery is due to a thin film of liquid on its surface. The mystery is why this layer forms at all. Recent studies suggest that surface ice does not fully transform into liquid water, but instead ends up in a mixed state between ice and water.