One of my ongoing fascinations is with sense of scale. Here’s a couple other interesting thought experiments to understand the immensity of our universe:

Suppose that our Earth is the ball in the tip of a ball-point pen. How big would the Sun be, and how far away from the pen tip? First, Hold the ball-point pen up in the air. Now hold a ping-pong ball about 15 feet away from the pen tip. This is approximately a size and distance scale model of the Sun and Earth. The moon would be the size of a dust speck beside the ball in the pen.

I was reading this profile of Albert Einstein yesterday and came across this mind-blowing bit of trivia. Einstein “calculated how many water molecules existed in 22.4 litres.” That’s pretty cool in and of itself. But going further, ‚Äúthat many unpopped popcorn kernels when spread across the United States would cover the country nine miles deep‚Äù.

A couple additions to my growing series of links about understanding large-scale concepts. Here’s a timeline of evolution from the beginning of Life up to Now. The image of the timeline is 135 feet long, and homo sapiens showed up right at around last pixel. And via infosthetics, a video comparing the planets, the Sun, and a number of other stars.
The first five links in my scalar collection were about the scale of the atom, the Earth’s population, the stars in the sky, showing 570 million years in 1 hour, and visualizing enormous numbers. Oh, as a bonus there’s also the one I linked a while back where you can learn about existing in 10 dimensions.

Scientists rethink the collapse of Easter Island society. Spoiler: It wasn’t just environmentally rapacious islanders, but the rats they brought along. [via ptdr]
Anil Dash gathers the best of Zidane Headbutt spin-offs, “dedicated to the head-first fight against alleged racism, the grand tradition of ridiculous memes on the net, and the premise that “Yakety Sax” is always funny.”

–Here is another entry to compliment the two earlier links in my ad-hoc Scalar Series: take a look at the atom and relative size of proton versus electron.

–The concept book for the Seattle Public Library, where the vision was introduced: “to redefine / reinvent the Library as an institution no longer exclusively dedicated to the book, but as an information store, where all media – new and old – are presented under a regime of new equalities.” I’m not sure about the actual content, but it certainly came out beautifully. [via ic]