Here are the Twitter #weirdscifacts for the past week!
375. Mar 23: What do walruses use their tusks for? Pulling their chubby selves out of the water onto ice, for one.
376. Mar 24: Non-Newtonian fluids — solid or liquid, depending on how hard you hit them! (post by @JenLucPiquant!)
377. Mar 25: Squid have mirror eyeballs — dielectric mirror eyeballs! (h/t @hectocotyli)
378. Mar 26: Gut bacteria may influence thoughts and behavior! 
“You are what helps you eat”?
379. Mar 27: The fanwing — a third type of powered lift for aircraft?
380. Mar 28: The 1755 Lisbon earthquake influenced the philosophy of thinkers such as Kant, Rousseau and Voltaire.
381. Mar 29: Giraffes they have a sponge-like collection of veins and arteries in the neck which regulates the flow of blood when they dip their heads to drink. (h/t @anthinpractice) This collection is called the rete mirabile (“wonderful net”).
Skulls in the Stars 
I wonder is this fanwing the same effect as the counter rotating wing, which you can emulate by throwing a yardstick, spinning it sideways? I saw a model demonstration once of a kite using this.