Pig bladders regrowing human limbs
Scientists have discovered that tissue from pig bladders can be dried into a powder called extracellular matrix and used to regrow human fingers. While typical mammals heal injuries by growing scar tissue, which prevents any future cell regrowth, the cells in the lining of pig’s bladder contain a protein that stimulates a total regrowth of tissue, similar to how lizards can regrow their tails. So far the treatment has been used to reattach severed fingers, develop new fingertips, and even help regenerate the destroyed muscles of an injured Iraq War veteran. These are the 15 science mysteries no one has figured out.
Goats producing spider silk
Scientists have been able to insert spider silk genes into goats. Why? The goats’ milk then contains the protein responsible for the silk, which could then be harvested in large quantities. Scientists hope to be able to use the spider silk, which can be up to five times stronger than steel, to enhance products ranging from artificial limbs to bulletproof vests.