So, so, so skin.

Keep your good going and breeze through busy days with mullah lights.

Now with a new thicker recipe with Vitamin B6 and Vitamin D. Or go on then? Mull a light, get the good going. You're going to. Hello welcome to the naked scientist with me Chris Smith and also with Cat Arnie. This week why we're just

passengers in our own bodies outnumbered by our resident bacteria? How these bugs can

alter your brain and your behavior and transpusion the poo transplant process that might one day save your life.

Plus why the chances of ET existing rocketed this week and how birds count in exactly the same way it seems that we do.

The Naked Scientists Podcast is powered by UKfast.co.uk. The likelihood of the existence of extraterrestrial life, that's aliens to you and me,

increased dramatically this week when astronomers

announced the discovery of a planetary system with four small rocky Earth-sized

planets around it. Even more impressive is that they're over 11 billion

years old.

Previously, scientists thought rocky and potentially life-sustaining planets like these

couldn't exist this early in the history of the universe.

From Birmingham University, Yarg Campant.

In this paper we announce the discovery of a fascinating planetary system

with five Earth-sized planets the date back to the dawn of the galaxy.

The innermost planets has a size similar to that of mercury, and its size has been measured with a precision of only a few tens of miles.

That's an impressive technological achievements.

The three intermediate planets are the size of Mars and the outermost planets

is slightly smaller than Venus.

When you say the dawn of the galaxy, how old is that and which galaxy are we talking about here?

We're talking about our own galaxy, the Milky Way, and the age of this system has been estimated at an impressive 11 billion years. The universe itself as an estimated

...