Caffeine acts as an antagonist at receptors in the brain for one of the chemical messengers called adenosine.

Memphian darkness

[…] are so many and great, that it is wonderful to me, that in a course of 30 years, it is not yet brought into general use. it is one of the remarkable proofs of the slowth with which improvements in the arts & sciences advance.

Even though Web 2.0 has not been fully implemented, there are talks of Web 3.0 and what the future may hold. Many predict it will be the Semantic Web where users will be able to request information rather than have to search for it.