Twain was fascinated with science and science inquiry.
He developed a long and close friendship with Nikola Tesla.
Twain patented three inventions.
His book A Connecticut Yankee in King Arthur's Court featured a time traveler ewho introduced modern technology to england and later became a story plot for many books and movies.
Twain went through a deep depression beginning in 1897 when his daughter Susy died of meningitis.
Olivia's death in 1904 and Jeans in 1909 deepened his depression.
In 1909 twain quoted"I came in with Halley's Comet in 1835. It is coming again next year, and I expect to go out with it. It will be the greatest disappointment of my life if I don't go out with Halley's Comet. The Almighty has said, no doubt: 'Now here are these two unaccountable freaks; they came in together, they must go out together."
In 1906 Twain formed the Angel fish and Aquarium club.
His prediction was correct he died on the comet's closest approach to earth.
Upon hearing of twains death president Taft said,"Mark Twain gave pleasure – real intellectual enjoyment – to millions, and his works will continue to give such pleasure to millions yet to come ... His humor was American, but he was nearly as much appreciated by Englishmen and people of other countries as by his own countrymen. He has made an enduring part of American literature."
He loved cats and wanted them around all the time.
His middle name was Langhorne.
He received a doctorate in letters from Oxford.
Twain was very interested in parapsychology; he foresaw his brother Henry’s death in a vivid and detailed dream (which came to pass) and even predicted the timing of his own death with some accuracy.
Other names he almost chose were Sgt. Fathoms and Thomas Jefferson Snodgrass
The name Mark Twain comes from a nautical term used by riverboat pilots on the Mississippi. Mark Twain indicated a water depth of 12 feet, the minimum for riverboats to navigate safely.
He served in the Confederate Army during the Civil War, but was an adamant supporter of abolition and emancipation.
He suffered greatly from depression.
He has no living direct descendants.
Mark Twain was a big fan of the fountain pen, which at first was a total mess. It spread ink all over your paper as often as it worked right, and was the butt of many jokes.