"In 2018, a K***er whale named Tahlequah, known to researchers as J35, grieved over her dead calf by carrying it across the ocean for 17 days and over 1,000 miles, refusing to let it sink."

"Dr. Jessie Lazear, an American physician who studied yellow fever under the famous Dr. Walter Reed. He allowed himself to be bitten by an infected mosquito, and died of the disease himself 17 days later, confirming how the disease was spread. His sacrifice saved millions."