How do these sand dollars form so beautifully? Coincidence?

>>2368386
dna coding you dolt

what would be the economic implications of making our currency actually based on sand dollars

>>2368420
Counterfeiting would be an issue.
Not to mention they are also brittle, so storage in a wallet would be hard.
If you made an artificial sand dollar it might be better? You can easily in grave dollar amounts into a casting as well, plus anti-conterfeiting measures.

>>2368386

Jesus.

>>2368420
nothing

File: Fig 10-1 Radial Symmetry in Animals.jpg (69KB, 640x480px) Image search: [Google]

69KB, 640x480px

Radial symmetry and survivor bias. Biological symmetry is beautiful because it reflects healthiness; if one side of a person's face looks different from the other side, it's usually due to some injury or illness; if both sides look exactly the same they're most likely healthy.

The sand dollars that are malformed and unsymmetrical usually don't survive past a very young age so you mostly ever find the shells of well-formed sand dollars.

What are those even like? I keep hearing they're like snails, but can they retract into their shell thing? How hard are they? Are the like starfish? They look more like starfish.