Metallic helium in massive planets | PNAS
Earth's core may have been leaking helium for millions of years | CNN
How some elements escape the Earth's atmosphere | Britannica
Humanity Is Thoughtlessly Wasting An Essential, Non-Renewable Resource: Helium
Helium-3 could be bound-up with iron and oxygen deep within the Earth – Physics World
Helium shortage: Doctors are worried that running out of the element could threaten MRIs
Is Earth's Helium Running Out? - Total Helium
A deep reservoir of primordial helium in the Earth
Earthquakes control the impulsive nature of crustal helium degassing to the atmosphere | Communications Earth & Environment
Blowing old-earth belief away (helium)
Fossil fuels linked to rise in atmospheric helium levels • Earth.com
Further evidence of Earth's core leaking found on Baffin Island
Helium from Earth's core hints at planet's formation | Popular Science
How to Make a Helium Atmosphere - NASA
Is a lot of the shortage of helium on Earth just due to helium balloons over the years? - Quora
ESSD - A comprehensive global oceanic dataset of helium isotope and tritium measurements
Potential Slow Leak Detected in Earth's Core, Scientists Report | by The Random Realm | Medium
Like a saggy balloon, Earth's core is leaking helium, a new analysis finds | Salon.com
Blowing Old-Earth Belief Away.
A deep reservoir of primordial helium in the Earth
Infographic: Helium, A Valuable Gas Not To Be Taken Lightly
Rare primordial gas may be leaking out of Earth's core | Live Science
What leaking helium-3 gas can tell us about Earth's origin - Big Think
The Hydrogen — Helium, Nitrogen — Oxygen Mystery | by Sam Kneller | The Explanation | Medium
How did Earth's atmosphere form? | NOAA SciJinks – All About Weather
