  Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals,[1] making up about 25% to 35% of the whole-body protein content.I â¦ t is naturally found exclusively in metazoa, including sponges. [2] In muscle tissue it serves as a major component of endomysium. Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals,[1] making up about 25% to 35% of the whole-body protein content.
The Southern Cassowary - The Most Dangerous Bird on Earth. Sunday, 1 September 2013. Ask a ten year old what the largest bird in the world is and the chances are you will get the right answer â the ostrich. Asked about the second largest and the odds are still very good that they will be able to name the Emu.
Deadly Strain Of Bird Flu Is 'Most Lethal' Flu Virus Yet At a briefing in Beijing Wednesday, World Health Organization officials called the H7N9 bird flu that's emerged in China one of the most lethal flu viruses so far. NPR science correspondent Richard Knox talks about what we know, and the questions that remain about the deadly strain. neal conan, host: At a briefing in Beijing today, World Health Organization officials describe the bird flu that's emerged over the past few weeks in China as one of the most lethal of its kind.