Two hearts pump blood to the gills, one to the body — and it uses copper, not iron, to carry oxygen, turning the blood blue. The main heart even stops when it swims, which is partly why octopuses prefer to crawl.
science
Two hearts pump blood to the gills, one to the body — and it uses copper, not iron, to carry oxygen, turning the blood blue. The main heart even stops when it swims, which is partly why octopuses prefer to crawl.
Source: smithsonianmag.com
Get Curio — more like thisShort reads that go somewhere. No feed to scroll forever.