Here’s the organism (well, sort of. . . .)!

Why Evolution Is True

Did you guess what organism made the pattern below, found on a recent dive around the hydrothermal vents off Tonga?

Here’s the answer in the second tweet:

How big is that thing? The laser beam images are 10 cm (about 4 inches apart): The paper from which this comes (below) adds, “Note the shield-shaped elevation, marginal elevated rim and mote, and color (pale pink) of the area of the pattern compared with the surrounding veneer of gray calcareous lutite (image courtesy The Stephen Low Company).” You can find thousands of these things on the wall of the mid-Atlantic Ridge.

The pattern is similar to that described in a 2009 paper in Deep Sea Research (click on screenshot to go there):

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