How many solar panels would it take to power the entire world? The entire surface of Africa, maybe? Actually, it’s surprisingly less.

Just 496,905 square kilometres. That’s less than the surface of Spain (504,030 square kilometres) covered with solar panels, distributed across deserts and areas with almost 24/7 sun, all year around.

The Internet could be described as something of a youthful beast. But even still, the very first domain name to be purchased and registered brings a tear to the eye of anyone that remembers when the Internet was only accessible via a 14.4k modem and an ISP that charged by the minute. Believe it or not, it wasn't www.internet.com or www.dot.com that was purchased when the Internet was "born." Instead, it was the somewhat off-the-wall symbolics.com.

The Forer effect (also called personal validation fallacy or the Barnum Effect after P. T. Barnum's observation that "we've got something for everyone") is the observation that individuals will give high accuracy ratings to descriptions of their personality that supposedly are tailored specifically for them, but are in fact vague and general enough to apply to a wide range of people. This effect can provide a partial explanation for the widespread acceptance of some beliefs and practices, such as astrology, fortune telling, and some types of personality tests.