The sun is midway through its life of fusion. It's about 5 billion years old, and though its life is far from over, it will undergo some pronounced changes as it ages. Over the next billion years, the ...
Most places on Earth have seasons because our planet is on a tilt as it orbits the sun. But our star also has its own version of seasons that affect life on Earth—and new astronomical research is ...
Scientists have long debated what causes glacial/interglacial cycles, which have occurred most recently at intervals of about 100,000 years. A new study reported in the March 24 issue of Nature finds ...
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