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  2. Immediately dangerous to life or health - Wikipedia

    en.wikipedia.org/wiki/Immediately_dangerous_to...

    The OSHA definition is arguably broad enough to include oxygen-deficient circumstances in the absence of "airborne contaminants", as well as many other chemical, thermal, or pneumatic hazards to life or health (e.g., pure helium, super-cooled or super-heated air, hyperbaric or hypo-baric or submerged chambers, etc.).

  3. The world is running out of helium. Here's why doctors are ...

    www.aol.com/news/world-running-helium-heres-why...

    A global helium shortage has doctors worried about one of the natural gas’s most essential, and perhaps unexpected, uses: MRIs.. Strange as it sounds, the lighter-than-air element that gives ...

  4. Helium shortage: Doctors are worried that running out of the ...

    www.aol.com/news/helium-shortage-doctors-worried...

    The world is running out of helium. Helium is the only element cold enough to keep MRI machines cool enough to function. Without it, doctors lose a valuable imaging tool.

  5. Suicide bag - Wikipedia

    en.wikipedia.org/wiki/Suicide_bag

    While asphyxiation by helium can be detected at autopsy, there is currently no test that can detect asphyxiation by nitrogen. For this reason, nitrogen is commonly the preferred choice for people who do not want the cause of death established. [4] [5] [6] Suicide bags were first used during the 1990s. The method was mainly developed in North ...

  6. Lifting gas - Wikipedia

    en.wikipedia.org/wiki/Lifting_gas

    Hydrogen and helium are the most commonly used lift gases. Although helium is twice as heavy as (diatomic) hydrogen, they are both significantly lighter than air. The lifting power in air of hydrogen and helium can be calculated using the theory of buoyancy as follows: Thus helium is almost twice as dense as hydrogen.

  7. Boeing Starliner’s crew is now on the space station after ...

    www.aol.com/news/boeing-starliner-team-detects...

    “We have some issues to watch overnight when in regards to the helium leaks that was just brought up, and we have a lot of smart people down here on the ground that are going to take a look at ...

  8. Toxic heavy metal - Wikipedia

    en.wikipedia.org/wiki/Toxic_heavy_metal

    In the 17th and 18th centuries, people in Devon were afflicted by a condition referred to as Devon colic; this was discovered to be due to the imbibing of lead-contaminated cider. In 2013, the World Health Organization estimated that lead poisoning resulted in 143,000 deaths, and "contribute[d] to 600,000 new cases of children with intellectual ...

  9. Nationwide helium shortage may affect weather forecasting - AOL

    www.aol.com/news/nationwide-helium-shortage-may...

    The Tallahassee office of the National Weather Service said they’ll be cutting back on their weather balloon launches due to a nationwide helium shortage.