How Do Scientists Search for Signals From Space?
Space is filled with radio signals. Scientists use enormous telescopes and powerful computers to determine which are natural, human-made or worth investigating further.
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Could an Alien Civilisation Detect Earth?
If scientists can search distant planets for signs of life and technology, could another civilisation do the same to Earth? Here’s what might give us away.
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What Are Technosignatures? How Scientists Search for Advanced Civilisations
Radio signals are only one way scientists could detect distant technology. Technosignatures could also include lasers, unusual chemicals and other artificial traces.
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What Are Biosignatures? How Scientists Search for Signs of Life on Distant Worlds
Scientists cannot visit distant exoplanets, but their atmospheres may contain clues to life. Here’s how biosignatures work and why they must be interpreted carefully.
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How Can Scientists Study the Atmosphere of a Planet Light-Years Away?
Scientists cannot collect air from distant exoplanets, but they can read their atmospheres in starlight. Here’s how spectroscopy reveals gases across light-years.
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Trump UFO Disclosure: Is the US Government About to Reveal More About UAPs?
Rumours of a Trump alien disclosure speech are spreading, while the US government continues releasing real UAP files. Here’s what is confirmed and what isn’t.
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What Is the Habitable Zone? Why “Earth-Like” Doesn’t Always Mean Habitable
A planet can orbit inside its star’s habitable zone and still be hostile to life. Here’s what the Goldilocks zone really tells astronomers.
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What Is an Exoplanet? How Scientists Discover Worlds Beyond Our Solar System
More than 6,200 exoplanets have been confirmed. Here’s how scientists find distant worlds and determine whether any could potentially support life.
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Could Mars Still Preserve Evidence of Ancient Life?
Mars once had rivers and lakes. Now Perseverance has collected a rock sample containing potential biosignatures — but that is not yet proof of ancient life.
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