The three-ship fleet headed to a spot in the Gulf of California. On one of the ships was Alvin, a deep-sea submersible built like a space shuttle to withstand the enormous pressures of ocean depths.

"In this breathtaking experience, former deep sea diver Chris Lemons will lead you on a guided tour of the relatively unknown ...

What’s more, isolation from Earth can be risky if an astronaut encounters an accident or has a life-threatening health problem while aboard a spacecraft. Over time, gravity can also be harmful to the ...

Modern oceanographic knowledge of deep-sea fish ... (Here's how astronaut suits tackle pressure and oxygen.) Finally we were all ready and I looked around at the sea and sky, the boats and my ...