A NASA planetary defense officer warns thousands of near-Earth asteroids capable of destroying a city remain undetected.
The discovery is just the latest to come from the asteroid sample, which dates back to the dawn of the solar system.
Asteroid 2025 TF's closest approach was about ~186 miles (300 km) from Earth. It is estimated to be about 2 meters (6.5 feet) ...
The universe might have far more amino acids lying around than we realized, which gives life itself far more chances to begin ...
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