Depending on how well youâve kept up with fire extinguisher maintenance, your portable fire extinguisher should last, essentially, forever. If youâve had the same fire extinguisher for a long time (10-12 years),one way to test its condition ) is to have it hydrostatically tested. A hydrostatic test exposes your fire extinguisher to high pressure (usually 500psi) to check the integrity of the shell.
Jingle Bells was the first song broadcast from space, in a Christmas-themed prank by Gemini 6 astronauts Tom Stafford and Wally Schirra. While in space on December 16, 1965, they sent this report to Mission Control : Gemini VII, this is Gemini VI.
An online receiver at the Marshall Space Flight Center is playing these songs of Earth so anyone can listen. Listen to this story. (requires RealPlayer) January 19, 2001 -- If humans had radio antennas instead of ears, we would hear a remarkable symphony of strange noises coming from our own planet.