propulsion

The UK's propulsion test was the result of a three-way collaboration between the UK government, industry and the US government.

"Also, when we bring in more software defined, 'smarter' vehicles, the ability to manage fleets remotely will help bring down costs as well. So the revolution will be about propulsion and software."

The country becomes just the second after the UK to receive Washington's elite nuclear propulsion technology.

This included issues with some of Starliner's thrusters, which would be needed to slow the spacecraft for re-entry into the Earth's atmosphere, and leaks of helium gas in the propulsion system.

Even though the tails lash back and forth while the rays swim, they are not used for propulsion; similarly, they are not used to kill prey or thwart predators.