@futurebird On the way to this conclusion, I spent some time thinking about a slightly different question: Things that are "Interesting" rather than "Weird". Conclusions:
The most interesting thing in the universe: Bacteria astronauts https://www.newscientist.com/article/dn8867-earth-rocks-could-have-taken-life-to-titan/ (this is based on simulations and isn't proven to be true. but it's POSSIBLE, and this is enough)
The most interesting idea: Braid matter http://arxiv.org/abs/0804.0037
The most interesting manmade thing: LISA https://en.wikipedia.org/wiki/Laser_Interferometer_Space_Antenna