Some see 5.0 seconds a possibility. Because 6' 5 Usian Bolt broke the mathematical model that had fit 100-meter record data for almost a century, his incredible performance has reset the bar for how fast researchers believe humans ultimately can run.
Lobsters may eat other lobsters in captivity, but this has not been observed in the wild. It takes an American lobster 6-7 years to get to an edible size, but that is just the beginning. Lobsters are long-lived animals, and are thought to be capable of living over 100 years.
Not only do lobsters die of old age, they don't even live as long as humans, according to our best estimates. I've written a fairly long post trying to track down the evidence and origin of this myth here: All lobsters are mortal. Written Sep 10, 2014 Â· View Upvotes.