NASA says Earth is about halfway through its lifespan. Scientists explain how solar changes could affect habitability, oceans, and the planet’s future over billions of years ...
Earth, now 4.5 billion years old, has reached middle age. Scientists explain how the Sun will shape its future and why studying Earth matters for human survival.
Planets are often described as ancient, unchanging worlds. Planets are born out of chaos, shaped by violent collisions and ...
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