To find out how many days you have been living on this planet, type your birthdate in the text input field of the Wolfram website listed below.
http://www.wolframalpha.com/
This website, (currently in its alpha test state), is using a new kind of knowledge-based computing. When you enter a question or calculation, the answer is computed using its built-in algorithms.
This information engine is much different than that of Google, since Wolfram derives its answers from a calculated "dataset" (from its own expanding database), rather than just finding the most relevant answer from the internet.
Therefore the usage of Wolfram's type of "engine" will differ from that of Google, and in some instances, could directly lead to more relevant results.
