In this second part of a two-episode series on the Nobel Prizes, we go into the Chemistry and Physics 2020 awarded to Emmanuelle Charpentier and Jennifer Doudna, for discovering one of gene technology’s sharpest tools — the CRISPR/Cas9 “genetic scissors”. And for Physics, British mathematician-physicist Roger Penrose received half of this year’s prize “for the discovery that black hole formation is a robust prediction of the general theory of relativity”, as the the Nobel Committee put it. German Reinhard Genzel and American Andrea Ghez received the second half of the prize “for the discovery of a supermassive compact object at the center of our galaxy.” We explain the science behind both awards. Guest: T.V. Venkateshwaran, Science Communicator, Senior Scientist at Vigyan Prasar, New Delhi. Find the In Focus podcast on Spotify, Apple Podcasts and Stitcher. Search for In Focus by The Hindu. Write to us with comments and feedback at socmed4@thehindu.co.in