Okay, so science doesn't know everything, and once you cross the barrier of quantum physics, you're out in the zone. You could probably include a lot of things about psychology in that list. The sheer fact of the matter is the more of the universe we figure out, the more unknowns we discover.
Argh. Who was it who said "Failing anything else, mankind is certain to discover immortality through spectacular error."?
Or: "Most discoveries are not accompanied by cries of 'Eureka', but rather a muttered 'Now what is causing THAT?' "