On Friday evening / Saturday morning 28,000 revelers arrived from all over the world to gather at Stonehenge in the UK - a very old stone circle which has stood in the middle of nowhere for around 6,000 years.

At precisely 4:58am on June 21st (it seems to be the same time every year, go figure) the sun rises and the longest day of the year (in england at least) begins. But thats not all, at precisely 4:58am the sun shines a path straight between the alter stone inside the circle, and the heel stone and slaughter stone to the north-east of the circle.

This isn't just very cool to witness (when the clouds are at bay) it is also quite remarkable that such a precise configuration could have been planned so very long ago.

Today, it would be relatively easy to conceptualize with all of the mapping, design, modelling, and analysis software we have at our disposal. But back then... it must have been quite a feat , though not nearly as hard to concieve it as actually constructing it.

You see, the stones - weighing about 4 tons each - were sourced from Wales - about 240 miles to the North West. The transport alone must have involved enormous collaboration. And then, once the stones were on-site, it must have taken even more concerted and coordinated effort to maneuver these great stones into position.

Imagine doing that on your own? Simply put, you coudln't. It took team work. Collaboration. There was no alternative.



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