Wolfram Alpha has redesigned its homepage. Wolfram Alpha is a knowledge search engine http://www.wolframalpha.com/examples/. I use it to assist my children with their math homework.
The new homepage is interactive for browsers or fact junkies like me. A person can click one of the hand drawn icons and a prefilled search box appears.
Searchers now can create a free Wolfram Alpha to save search history, annotate queries, and copy results in plain text.