Hitchhiking aliens are already traveling between planets, new research suggests. This theory, known as panspermia, suggests that life’s building blocks are widespread throughout the cosmos and can travel between different areas in space.
The panspermia hypothesis has been sparking fierce debates for centuries. Anaxagoras, a Greek philosopher from the 5th century BCE, proposed the idea that life exists everywhere in the universe, coining the term panspermia to describe the concept of life traveling between planets as seeds.
Other Greek philosophers such as Anaximander and Thales also discussed the philosophical aspects of the panspermia theory.
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