Brain cells are constantly swallowing material from the fluid that surrounds them—signaling molecules, nutrients, even pieces of their own surfaces—in a process known as endocytosis that is essential ...
"Primary mesenchyme cells (PMCs) inside a sea urchin embryo deposits amorphous CaCO3 within the matrix of spicule proteins where these bricks are shaped into layers of calcium carbonate crystals," ...
Researchers have suggested that a massive extinction of soft-bodied life allowed hard-bodied, calcified life to flourish. But Rachel Wood at the University of Edinburgh, UK, and her colleagues found ...
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