I am interested in compiling a list of human mental feats that seem impossible, but have been confirmed. I am only interested in feats that have been reliably confirmed and/or documented. Here are some examples of the kinds of feats I am looking for: Prior to the printing press, people would pass stories from generation to generation by memory. If I recall correctly, some people could memorize hundreds or even thousands of pages of text. People (savants?) who can instantly tell you the day of the week for any date going back hundreds of thousands of years. People (savants?) who can instantly take the square root of any number to hundreds of decimal places or multiply very large numbers. People (savants?) like in Rainman who can look at a pile of spilled toothpicks and instantly tell the number. People who perform amazing feats of strength in crises such as a woman lifting a car off of her child. I am interested in anything that would be impossible for the average person, especially anything that would lead people to infer divine or extraterrestrial influence or assistance.