A new study suggests gray seals (Halichoerus grypus) can sense the level of oxygen in their blood and that the animals change their diving behavior in response. Seals can do many things humans can ...

“This puts the sleeper in a position similar to the letter Z, but with the laps stretching a bit onto the bed. The legs are elevated at a 90-degree to 120-degree angle.” The Navy Seal Sleep ...

One of those injured fighters was Ryan Larkin, an elite Navy SEAL who joined right out of high school and served in four combat deployments before severe depression led him to take his own life.