This Week in Science: Jan 27 – Feb 2, 2018

Scientists grow new ears from the patient's own cells

A psychologist creates a chatbot that specifically deals with depression

A new study shows that mosquitoes can be trained not to bite humans

Bill Gates is working with geneticists to create the "perfect cow"

A new paper suggests we can use farmland soil to trap carbon

Scientists find a way to predict hailstorms three weeks in advance