The first animals on Earth had no skeletons and that changes everything

ScienceDaily
Feb 28, 2026, 9:50 am111 ptsTrending
Sponges may be ancient, but their timeline has been murky. New research suggests the earliest sponges were soft and skeleton-free, explaining why their fossils don’t appear until much later. By analyzing hundreds of genes and modeling how skeletons evolved, scientists found that mineralized spicules arose…

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