29.8 Dark Matter and Dark Energy

Dark Matter

The current understanding of the nature of dark matter is discussed. Duration: 8:39.

Dark Energy

<p>The current understanding of the nature of dark energy is discussed. Duration: 5:06.</p>

The Fate of the Universe

A description of three possible fates of the universe: heat death, the Big Rip, and eternal inflation. Duration: 7:40.