All that and more on tonights pbs newshour. Major funding for the pbs newshour has been provided by moving our economy for 160 years. Bnsf, the enginthat connects us. Supported by the john d. And catherine t. Macarthur foundation. Committed to building a more just, verdant and peaceful world. More information at macfound. Org and with the ongoing support of these institutions this program was made possible by the corporation for public broadcasting. And by contributions to your pbs station from viewers like you. Thank you. Woodruff less than two weeks after the attacks in paris and with a Worldwide Travel alert in place, president obama told americans today theres no credible threat to the u. S. This holiday weekend. He urged people to go about their normal activities this thanksgiving. At the white house, flanked by his top counterterrorism and National Security advisers, he said the u. S. Is working overtime to protect the homeland. The combined resources of our military, our intelli
Her remarkable career. All that and more on tonights pbs newshour. Major funding for the pbs newshour has been provided by moving our economy for 160 years. Bnsf, the engine that connects us. Supported by the john d. And catherine t. Macarthur foundation. Committed to building a more just, verdant and peaceful world. More information at macfound. Org and with the ongoing support of these institutions this program was made possible by the corporation for public broadcasting. And by contributions to your pbs station from viewers like you. Thank you. Woodruff less than two weeks after the attacks in paris and with a Worldwide Travel alert in place, president obama told americans today theres no credible threat to the u. S. This holiday weekend. He urged people to go about their normal activities this thanksgiving. At the white house, flanked by his top counterterrorism and National Security advisers, he said the u. S. Is working overtime to protect the homeland. The combined resources of
No, no, h okay. That is heavy, okay . If that anvil, all of a sudden, started like scooting across the table, you will look for some reason for that, wouldnt you . Maybe youll look for maybe a rope that you cant see or maybe a magnet or something. This is just not gonna move of itself, is it . Theres gonna be a reason for it to move. Hey, this is the 20th century, we know there are reasons for things, right . I take this ball, okay . This ball. Put this ball. That ball starts all of a sudden going up in the air. You will look for maybe a string that you cannot see or something, right . Things dont move of themselves, do they . Or do they . Poltergeist. Yeah, or do they . Okay. Were gonna talk about that. A fellow by the name of aristotle, who was a giant for the human intellect and the advancing humankind, way back fourth century b. C. Classified many things and brought knowledge to a very, very high point. But aristotle made some mistakes and not to emphasize his mistakes, but one of
Heavy or light . Begin with the h. No, no, h okay. That is heavy, okay . If that anvil, all of a sudden, started like scooting across the table, you will look for some reason for that, wouldnt you . Maybe youll look for maybe a rope that you cant see or maybe a magnet or something. This is just not gonna move of itself, is it . Theres gonna be a reason for it to move. Hey, this is the 20th century, we know there are reasons for things, right . I take this ball, okay . This ball. Put this ball. That ball starts all of a sudden going up in the air. You will look for maybe a string that you cannot see or something, right . Things dont move of themselves, do they . Or do they . Poltergeist. Yeah, or do they . Okay. Were gonna talk about that. A fellow by the name of aristotle, who was a giant for the human intellect and the advancing humankind, way back fourth century b. C. Classified many things and brought knowledge to a very, very high point. But aristotle made some mistakes and not to
And how could you tell whether or not the earth is at rest and the stars are going around us, or the stars are maybe at rest, were going around them . In fact, whats the nearest star . Begins with an s. You are now let me tell you. Begins with a s, ends with a n, got a u in the middle, try it. Sun. Sun. Very good, okay. Thats the sun. The sun is the nearest star, okay . And we go around, around, around the sun, is that true . But it was one time thought thats not the case. And one of the arguments that was advanced to show that the earth really is at rest and not the other way around is the following consider a bird at the top of a tree, and down below theres a juicy worm just coming up to the ground. And the bird is up at the top and looks down and sees the worm. Now, we know from experience thats its possible for that bird to drop from the tree, come down, catch the worm and fly back up. True . And it was stated as such. It was calculated how fast the world would have to be moving, e