She had previously observed the lizards using a bubble underwater. When threatened by a predator, these lizards dive beneath the surface and create a bubble over their heads to breathe.

No problem! Scorkl is a mini scuba device that can be pumped up by hand and it allows you to dive for up to 10 minutes. The high-pressure hand pump can pump to 3,000 psi which allows the small ...

This home-built boost pump is designed to take in a volume of ... With the increased pressure, the O2 can be added to a SCUBA tank that contains high pressure air to create what’s known as ...

With a roomful of children as darling as any from Whoville waiting 21 feet below, Scuba Santa went through his final safety check as he told the story of his closest call in 22 years of collecting ...