Helium is the second-most-common element in the universe after hydrogen. But it is rare on Earth, where it mainly exists in small concentrations in pockets of natural gas.
Key takeaways
Quick scan — what you need to know:
- Helium is the second-most-common element in the universe after hydrogen.
- But it is rare on Earth, where it mainly exists in small concentrations in pockets of natural gas.
Background
What led here, in plain terms:
- Helium is the second-most-common element in the universe after hydrogen.
- But it is rare on Earth, where it mainly exists in small concentrations in pockets of natural gas.
Why it matters
Why readers and decision-makers should care:
- Helium is the second-most-common element in the universe after hydrogen.
- But it is rare on Earth, where it mainly exists in small concentrations in pockets of natural gas.