5 most incredible discoveries of the week

2. Cats might help us make HIV vaccine : The quest for an HIV vaccine might get a boost from cats.

http://www.usatoday.com/story/news/nation/2013/10/05/newser-discoveries/2926969/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+usatoday-NewsTopStories+%28USATODAY+-+News+Top+Stories%29