Early crinoid faunas, characterised by a range of stem lengths and arm branching patterns, have provided vital clues regarding ancient marine ecosystems and the processes of niche partitioning.

New Mexico geologist and author Magdalena Sandoval Donahue discusses the interesting geology of the Santa Fe National Forest ...

The tubular stems of crinoids and the shells of brachiopods are preserved in the rocks but could easily be missed without a sharp eye.

Mesenchymal stem cells articles from across Nature Portfolio Mesenchymal stem cells are multipotent adult stem cells that are present in multiple tissues, including umbilical cord, bone marrow and ...