Knowledge
Projection: Knowledge will double every 73 days by the year 2020 (as reported by a presenter at the June 1992 Conference Teach America: Teacher Preparation for the New American School).
Estimated number of years it took for knowledge to double since 1750:
1750 - 1900: 150 years
1900 -1950: 50 years
1950 - 1960: 10 years
1960 - present: 5 years
Now with computers and the internet, the accessibility of information and knowledge is probably doubling every year or even sooner.
You can only absorb and evaluate a small part of this explosion of information and knowledge. Multiply your chances of profiting from and applying this knowledge by learning the method used to originate, refine, extend, and apply knowledge in all fields - the scientific method.