March 31, 2021 10:34 am Pain and Brain: The Science of Why Things Hurt Sue O’Connell sat down with author Linda Rodriguez McRobbie, whose new book “Ouch!: Why Pain Hurts, and Why It Doesn’t Have to” digs deep into the science of physical pain. US & World Videos 3:50 Musk celebrates with Trump crowd at rally 1:09 Biden in farewell to staff: ‘We have lots more to do' 0:38 Sen. Fetterman attends inauguration in hoodie and gym shorts 1:27 Former President Biden leaves US Capitol 0:41 Trump touts American ambition, sets sights on Mars