Paleontologists have discovered the cause of small holes that have frequently been observed in ancient eukaryote fossils. Please check out the source even if you only look at the amazing picture...
They were being sucked dry by other predatory species.
Forget about a "fall" from a Disneyesque utopia. Creatures have been consuming each other since the very beginning of life.
Reality is far more exciting than fantasy. Read more here...
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Man, her last work, who seem’d so fair,
Such splendid purpose in his eyes,
Who roll’d the psalm to wintry skies,
Who built him fanes of fruitless prayer,
Who trusted God was love indeed
And love Creation’s final law–
Tho’ Nature, red in tooth and claw
With ravine, shriek’d against his creed– Alfred Tennyson