Why it's so hard to look for evidence of aliens

Looking for aliens may be "like imagining a color we've never seen"

illustration of UFOs
(Image credit: Getty Images / KTSDESIGN / SCIENCE PHOTO LIBRARY)

The perennial question on the existence of aliens has been circulating anew. Some evidence suggesting there is life outside of Earth, including from the Perseverance rover on Mars, have been found, but many unanswered questions remain. If aliens really exist, how could we find them?

What does the evidence suggest?

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Devika Rao, The Week US

 Devika Rao has worked as a staff writer at The Week since 2022, covering science, the environment, climate and business. She previously worked as a policy associate for a nonprofit organization advocating for environmental action from a business perspective.