Okay, so maybe not Ridley Scott’s aliens, but there are definitely foreign puppeteers pulling the strings from inside your body.

The good news is that they are fairly happy to coexist with you, instead of bursting out of your chest like Porky Pig at the end of a Bugs Bunny cartoon…

You’re probably aware that there are trillions of bacteria that live in your stomach and intestines, but their importance and influence in maintaining your overall health may not have been highlighted to you…