NASA astronaut Bruce McCandless became the first person to go on a spacewalk without a tether. McCandless was wearing a type of jetpack known as the Manned Manoeuvring Unit, or MMU. The MMU fit over a ...

These New York City detectives and prosecutors go to extreme lengths to keep their city safe, and they have been since 1990.

We are a reader-supported site and receive compensation from purchases made through these links. See more about our Privacy ...

Virtual Heart Beating Between Hands Digital video showing the transparent heart model on virtual simulator. where is the human heart stock videos & royalty-free footage Human heart made out of lines, ...

Video Back Videos home Signature collection Essentials collection Artificial Intelligence Trending searches ...