Quick Answer. Curad advises that healing occurs in four stages with deep cuts: hemostatis, which occurs immediately; inflammation, which lasts up to 4 days; proliferation, which typically takes 21 days; and remodeling, which can take up to 2 years. Keep Learning.
Euler Problem 14: Longest Collatz Sequence. Euler Problem 14 looks at the Collatz Conjecture. These playful sequences, named after German mathematician Lothar Collatz (1910â1990), cause mathematicians a lot of headaches. This video introduces the problem much better than I can describe it.
Australian commercial pilot Dave Shaw holds the record for the deepest dive from the surface on closed circuit SCUBA (rebreather) for a dive he made to 270 meters (886 feet) at Boesmansgat on 24 October 2004. This is also the deepest recorded cave dive.