Hokkaido University researchers found ancient squids were the dominant ocean predators 100 million years ago - before dinosaurs went extinct.

One of the most spellbinding of these animals is the colossal squid (Mesonychoteuthis hamiltoni). When full-grown, this creature is about as long as a bus and weighs nearly 1,100 pounds.

The STP is a 360-degree steerable propulsion unit which has two similarly-sized propellers, both mounted on a single shaft and rotate in the same direction.

A pair of Kratos XQ-58A Valkyrie uncrewed aircraft flew a combat training mission controlled by pilots flying a single-seat F-16C and a two-seat Boeing F-15E.