Bridges That Build Themselves

The two oldest types of bridge are the arch bridge and the corbel bridge.  It takes a lot of time and effort to build them, but they can last for thousands of years.

Rockfalls can make natural bridges over streams, but the 'design' is very inefficient.  The water channels are easily blocked, with resultant flooding of the adjacent banks.

If I told you that a tornado could pick up rocks and drop them across a river so as to form a perfect arch bridge, you wouldn't believe me.  I hope.  The only way to build a stone arch bridge is to set up a type of scaffolding, shuttering, or former - more properly known as centering.
I  don't get why science writers don't cover science education.

They cover whatever cool science is the flavor of the moment, they cover disasters and the science behind them, they cover scientists but they don't cover the kids who are going to replace them and what they're being taught. Call a science publication land ask it to do a story on science education - they'll tell you they do something once a year. Read them - you'll see what I mean. Read the regular national press and you'll find very little too.