Ancient landmarks that have endured the passage of time and silently observed human history are scattered across the globe.

For example, in a forest a pyramid of numbers might show a single tree feeding loads of caterpillars, which can feed several blue tits, which can feed a couple of hawks. But this doesn't look like ...

The pyramid contains figures as of 1950 and also provides a forecast for the coming decades. The ‘play’ button shows the development through the years. You can pin an age by clicking on it: for ...

Have scientists discovered giant structures beneath the pyramids, including columns extending hundreds of meters into the ground?

or buy a pre-made pyramid, you can take some inspiration from a few more examples that we found below. And some tips for ...

The pyramid contains figures as of 1950 and also provides a forecast for the coming decades. The ‘play’ button shows the development through the years. You can pin an age by clicking on it: for ...