"A four-finned robot ripples through the water, taking inspiration from the movement of cuttlefish.
Although the animal is better known for its powers of disguise and stunning communication skills, its undulating swimming motion is also noteworthy, allowing for efficient and agile motion.
Created by Pascal Buholzer and fellow students from the Swiss Federal Institute of Technology in Zürich, the copycat robot, named Sepios, demonstrates that its finned design can be an environmentally friendly alternative to propellers."
Studying dinosaur bones and physiology can only teach us so much about how dinosaurs actually walked the Earth. Because dinosaurs called theropods are related to modern birds, a few researchers thought they could study how they walk using chickens.
Theropods include dinosaurs like the Tyrannosaurus and Velociraptor, but they also ranged in size all the way down to tiny chicken-sized raptors covered in feathers. Theropods and modern birds also both have spongy air-filled bones, wishbones, and feathers and lay eggs and watch over them.
The paper states that as gas spirals toward a black hole through a formation called an accretion disk, it heats up to roughly 10 million degrees Celsius. The temperature in the main body of the disk is roughly 2,000 times hotter than the sun and emits low-energy or "soft" X-rays. However, observations also detect "hard" X-rays which produce up to 100 times higher energy levels.