We are not made of the same matter as most of the Universe! This
surprising conclusion, that the ordinary matter we are made of (protons,
neutrons, and electrons) constitute only 13% or so of the total matter
in the Universe, the rest being in the form of Dark Matter. Further,
this dark matter is only about 30% of the combined matter and energy
density of ... Show More
Jun 2009
Telescopes that Rocked Our World
This year marks the 400th anniversary of Galileo’s use of the first telescope. On this week’s show, we reflect on how telescopes have shifted our perspective on how small we are in size, space, and time. We also discuss how they help astronomers discover new and interesting aspec ... Show More
56 m