Good morning! We are deep in March Mammal Madness, obviously, which may be why today’s links seem rather number-heavy.

Bill Lucey analyzes the numbers in the new Congress. 

Here’s an amazing chart which tracks the most populous cities from 1500 AD to modern times. (I LOVE stuff like this.)

Something else I love is the Guardian’s ongoing “Unbuilt Cities” series. In its latest installment, it looks at bridges designed but never built. (Look at that Washington DC bridge!)

And finally, here’s how to make practically anything out of paper or cardboard. Wow.