About one third of all of the protein in your body is collagen. Collagen is a major structural protein, forming molecular cables that strengthen the tendons and vast, resilient sheets that support the skin and internal organs. Bones and teeth are made by adding mineral crystals to collagen.
User-generated content. User-generated content (UGC), alternatively known as user-created content (UCC), is any form of content created by users of a system or service and made available publicly on that system.
A UNSC cruiser was the most powerful warship ever created by humanity. The Halcyon-class cruiser was a mainstay of the UNSC fleet for about half a century. The smallest human warship to receive the designation of cruiser, these still-enormous vessels exceeded a kilometer in overall length.