In their ongoing efforts to make drugs cheaper, Japanese researchers at the National Institute of Advanced Industrial Science and Technology (AIST) have genetically engineered chickens to lay eggs containing drugs that can fight diseases like hepatitis and cancer. According to Phys.org, the unique drug creation technique uses gene-editing technology to make the …er, cocks produce interferon beta, a protein related to the immune system that is a powerful tool in treating of skin cancer and hepatitis. Those cells were then used to fertilize eggs and create hens, which inherited those genes. A few rounds of cross-breeding later and voila!: chickens were laying eggs with disease-fighting superpowers.