There is a gene for happiness!

Apparently there is a gene for happiness and according the Ellen DeGeneres some of the key things that cause happiness are:

• Having a B-positive blood type.
• An act of kindness (or simply witnessing an act of kindness.)
• Stating at least 3 things you're grateful for.
• Pictures of cute animals
• Pictures of cute people.
• Pictures of cute people holding animals. 

To see Ellen's explanations of these things, watch this clip.