NBCUniversal Inc. April 22, 2017 3:35 pm Thousands March Through Downtown LA for Nationwide March for Science Thousands of people gathered in downtown Los Angeles to join a nationwide March for Science on Saturday, April 22, 2017. US & World Videos 5:49 Kelly Clarkson hilariously attempts handmade pasta with chef Evan Funke 1:59 Ellen DeGeneres jokes about being ‘kicked out of show business' 2:03 Does Shakira still believe in love following Gerard Piqué split? 1:36 O.J. Simpson's cause of death revealed 0:59 Paramedic involved in Elijah McClain's death sentenced to 4 years of probation