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.
The best way is to estimate age is based on the weight of the lobster. It takes approximately seven years (depending on the gender and water temperature) for a lobster to grow to legal harvesting size (1-1 1/4 lb.). After that, a lobster will grow about 1 pound for every 3 years.