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Example Sentences

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DNA from living sponges and chemical traces preserved in ancient rocks indicate they emerged at least 650 million years ago.

From Science Daily

These durable elements fossilize well and appear in rocks dating back about 543 million years to the late Ediacaran Period.

From Science Daily

To address the discrepancy, Dr. Rossi and her colleagues used a two part strategy.

From Science Daily

Their results place the origin of sponges between 600-615 million years ago, narrowing the gap between genetic predictions and fossil evidence.

From Science Daily

Next, they examined how sponge skeletons developed over time and discovered that spicules arose independently in separate sponge lineages.

From Science Daily