Optical illusions occur when what the eyes see conflicts with what the brain expects.
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Scientists are working on a portable spray-on-skin that can heal severe wounds in just a few minutes.The spray mainly contains important proteins that can reprogram the injured cells to become stem cells, and back to young uniformed skin cells. So far they were able to accelerate healing process from 12 weeks to 21 days with a similar approach.
16
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Research indicates that plants grow healthier when they are stroked.
173
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Iron weighs more after it rusts.
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