107K views · 1.8K reactions | Documentary filmmaker Ken Burns reveals how his own history has been shaped by the loss of his mother Lyla when Ken was 11 years old. Go to CNN.com/allthereis to join the All There Is community, where you can share your story and watch the full conversation. | CNN | Facebook

Facing concerns about his own family history of Alzheimer's, CNN chief medical correspondent Dr. Sanjay Gupta visits preventive neurologist Dr. Richard Isaacson to have his own risk for dementia assessed in the CNN documentary "The Last Alzheimer's Patient." Watch the full documentary on CNN's "The Whole Story" premiering on May 19 at 8p ET/PT and streaming on MAX on June 18. | CNN

Two families in South Carolina with almost the same last name found each other after generations of separation. The Black Simrils and the White Simrills came from the same plantation more than 200 years ago, and while their shared history is painful, their reunion generations later is full of joy. Watch the full documentary The Simril(l)s: A Family in Black and White on The Whole Story with Anderson Cooper on September 21 at 10 p.m. ET/PT. | CNN International

Welcoming a new year in Times Square wouldn't be the same without the famous ball drop. CNN explores the history of this eye-catching ritual. | CNN International