Infrared dark clouds (IRDCs) are cold, dense, massive Galactic star-forming regions that allow us to understand the physical conditions during the early stages of high-mass star formation (0 and early B-types, >20 MSUN). We present a sample of ~3,000 . . .

The order Nudibranchia, characterized by having a shell-less body and an exposed gill, is estimated to contain 3,000 species worldwide. Nudibranchs occur from the equator to the both polar regions, and have diverse external morphologies and flamboyant . . .