Russian billionaire Yuri Milner and astrophysicist Stephen Hawking have invested $100 million in the search for extraterrestrial life through SETI's new Breakthrough Listen initiative. The funds will be used to expand the scope of the hunt for signs of intelligence in the cosmos over the next 10 years. The investment comes at a crucial time for SETI, which has endured a controversial lifespan and lost federal funding. The initiative will provide thousands of hours per year on the best instruments for researchers.