How Steam Worlds Challenge Our Views on Planetary Habitability
- Sandeep K S
- Aug 26, 2025
- 1 min read
Updated: Oct 25, 2025
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Where Is Everybody? And yet, no signals. No visitors. No evidence of anyone at all.
It is one of the most famous questions in science, asked over lunch by physicist Enrico Fermi. With hundreds of billions of stars and billions of years, life should have emerged many times over. And yet, no signals. No visitors. No evidence of anyone at all.
The universe is 13 billion years old. Our galaxy alone contains hundreds of billions of stars, a significant proportion of which host planets. Many of those planets sit in the right temperature range for liquid water.
2 days ago1 min read
Would Earth still be a world capable of supporting life?
Here's a thought experiment that keeps planetary scientists awake at night. Strip every living thing from our planet—every bacterium, every blade of grass, every creature that has ever drawn breath—and ask a simple but profound question: Would Earth still be a world capable of supporting life?
The answer, it turns out, is yes. And that finding has enormous implications for how we search for life beyond our solar system. The problem is subtle but important.
2 days ago1 min read
Using the MeerKAT radio telescope, astronomers have discovered a natural "space laser"
Using the MeerKAT radio telescope, astronomers have discovered a natural "space laser" originating from a violently merging galaxy more than 8 billion light-years away.
When gas-rich galaxies collide, the impact compresses enormous reservoirs of gas. This violent cosmic crash can stimulate molecules—specifically hydroxyl (OH) molecules—causing them to emit incredibly bright, coherent radio waves.
2 days ago1 min read
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