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2 total sentences available.
Stromatolites are the limestone structures formed by photosynthesizing bacteria called cyanobacteria. They created layers of alternating slimy bacteria and sediment in very shallow water, dominating shallow seas until predators, such as trilobites, came into the picture.
Source: tatoeba (6920722)
Abigail Allwood's team trudged a 10-kilometer-long stretch of stromatolites and identified seven different types with exotic shapes.
Source: tatoeba (12131052)
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.