I'm John Batter with Gober Chilling, his wonderful new book, The Elephant in the Universe

is the frontier of thinking about dark matter, dark energy, and our universe. 100 year search.

Right now, however, the searching the heavens, the searching particle physics, they're

in minds waiting for collisions, and come to an exception. They found a galaxy

without cold dark matter. They found several of them in fact and that worries everybody or the quote

D.F 44 that's the name of the galaxy they call it the dragonfly galaxy is a problem

for everybody is it a problem for mun too is this a problem for everybody. Is it a problem for Munn too?

It is a problem for Munn too, because Monce is this alternative theory that tries to explain

dark matter not by introducing a new particle but by assuming that our theory of

gravity is wrong. Now if mond is correct then we should see the effects of

mount in each and every galaxy because they don't assume that there is dark matter,

they just assume there are stars and gas clouds with a different gravity than we are used to think of.

So according to Monde, each and every galaxy should show these effects of of their alternative gravitational theory.

And if you see a galaxy without... of their alternative gravitational theory.

And if you see a galaxy without the gravitational effects that we attribute to dark matter,

then it cannot be explained by months too.

So there is this strange galaxy that found a couple of these dwarf galaxies that seem to be devoid of dark matter and no one has a good explanation for it and so it's another way science works you can have theories you can have experiments you can make conclusions and think that you almost solve the problem, but nature always has the last word.

And if nature comes up to the galaxy with no dark matter, you need to be able to explain that.

And you need to go back to the drawing board and start over your calculations again.

I said earlier my favorite chapter was Mund.

I forgot my favorite chapter was chapter 24 the dark crisis this this is wonderful all right

put your thinking caps on because we're about to imagine why it is we can't find

...