Velvet worms arent actual worms.. They are invertebrates from phylum Onychophora. Velvet worms come in different colors, and they spit slime to hunt their prey.
Parazoanthus axinellae | ©João Pedro Silva (Paredes do Cabo, Sesimbra, Portugal)
Parazoanthus axinellae is a Mediterranean zoanthid coral (an animal and not a flower), always associated in colonies, measuring up to 4 cm. Individuals are yellow sharp with orange, and has 34 tentacles laid out in double crown [source].
Animalia - Cnidaria - Anthozoa - Zoantharia - Zoanthidea - Parazoanthidae - Parazoanthus - P. axinellae
Newton’s third law says that forces come in equal and opposite pairs. This means that when air exerts lift on an airplane, the airplane also exerts a downward force on the air. This is clear in the image above, which shows a an A380 prototype launched through a wall of smoke. When the model passes, air is pushed downward. The finite size of the wings also generates dramatic wingtip vortices. The high pressure air on the underside of the wings tries to slip around the wingtip to the upper surface, where the local pressure is low. This generates the spiraling vortices, which can be a significant hazard to other nearby aircraft. They are also detrimental to the airplane’s lift because they reduce the downwash of air. Most commercial aircraft today mitigate these effects using winglets which weaken the vortices’ effects. (Image credit: Nat. Geo./BBC2)