text:  I'm Scott Detrow. And I'm Juana Summers. As Democrats walk that tightrope, they're trying to glean insight from the polls. We'll examine what they can and cannot tell us about the state of the presidential campaign. You have two factors, Biden's age and Trump's not telling the truth. And for a lot of independent voters, that was already there. And putting all of that political news into a cosmic perspective, scientists say they found a new kind of black hole, one they've long been hunting for.