Earth’s first animals barely evolved until sex changed everything

Science Daily | Wed, 10 Jun 2026 00:56:30 EDT

Ages of stillness,
Asexually they thrived—
Sex sparked life's wild bloom.

Earth’s earliest animals may have held evolution back because they reproduced asexually, creating low-competition communities that changed very little over time. When environmental pressures pushed them toward sexual reproduction, biodiversity exploded and evolution accelerated dramatically.

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