When Black Holes collide with professor Geraint Lewis (205)

<p><span style="font-size: 10pt;">We are learning more about Black Holes with the latest detection Technology. Prof. Geraint Lewis tells Dr Karl about how we found black hole twins, how we know they are not identical and what it means for Einstein's predictions. <br /> www.geraintflewis.com<br /> http://drkarl.com<br /> <br /></span></p>