Spencer Wells builds a family tree for humanity | Video on TED.com

About this talk
All humans share some common bits of DNA, passed down to us from our African ancestors. Geneticist Spencer Wells talks about how his Genographic Project will use this shared DNA to figure out how we are -- in all our diversity -- truly connected.

About Spencer Wells
Spencer Wells studies human diversity -- the process by which humanity, which springs from a single common source, has become so astonishingly diverse and widespread.




Spencer Wells builds a family tree for humanity | Video on TED.com

Patricia Burchat sheds light on dark matter | TED.com

About this talk
Physicist Patricia Burchat sheds light on two basic ingredients of our universe: dark matter and dark energy. Comprising 96% of the universe between them, they can't be directly measured, but their influence is immense.

About Patricia Burchat
Patricia Burchat studies the structure and distribution of dark matter and dark energy. These mysterious ingredients can't be measured in conventional ways, yet form a quarter of the mass




Patricia Burchat sheds light on dark matter | Video on TED.com