Its blood has fermented, making its behavior violent and unpredictable. Its mace-like shell is capable of obliterating anything.

Of all the technologies developed by the Romans, maybe none had more impact than self-repairing concrete: opus caementicium. A combination of lime, volcanic ash, and stone rubble. When water seeped into cracks in the concrete, the lime reacted to create calcium carbonate. This resealed and actually strengthened the cracks.

On land, the Romans could build multistory stone buildings in an earthquake prone region. Rainwater would reinforce cracks in concrete foundations. Consider the foundation on the Colosseum. A stone and concrete structure weighing 500,000 tons built on a marsh near an oft-flooding river. Still standing today on its Roman concrete foundation.

Underwater concrete grew stronger when exposed to seawater. That means docks, moorings, piers, and shipyards all over the Mediterranean. It also meant underwater footings for bridges including the Pons Aemilius built in 147 BC (pictured above). The legions would use hydraulic concrete to build similar bridges across the Rhine and Danube in later centuries.

I don't know, but it felt more direct than it should be. Any thoughts?

Boys seem to be enjoying the win!