Giving thanks isn't just a holiday tradition. It's part of how humans evolved herald-dispatch.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from herald-dispatch.com Daily Mail and Mail on Sunday newspapers.
Giving thanks isn't just a holiday tradition. It's an important part of being human. Science says the feeling of gratitude probably showed up early in our evolution. Young kids and even some chimps show that they want to return favors to those who help them out. Researchers believe gratitude probably helped early humans work together and survive as social animals.