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Attention all passengers. The Uber ride for Mark and Jamal's romantic weekend will depart in four minutes from Platform 6.

Your ride comes with a rolling countryside sunset view and a table seat ideal for playing

footsie beneath.

Thank you for booking your tickets on Uber.

Trains on Uber. Welcome to Cool Stuff Daily.

I'm Zach Morris.

Today's show will be about science reminding us how the human body is far more complicated

and way more interesting than the back of a nutrition label.

Today's story starts with a simple question.

If two people eat the same exact meal, do they absorb the exact

number of calories? For more than a century, most of us have assumed the answer was yes.

Turns out, not necessarily. Imagine two people sitting down to identical lunches, same sandwich,

same chips, and the same cookie. Common sense would say both people are getting the same amounts of

energy from that meal. But researchers now say the answer is much messier because digestion is not

just about you, it's about the trillions of microscopic roommates living inside your gut.

Scientists at Arizona State University developed a new mathematical model called D-A-M, short for digestion, absorption,

and microbial metabolism.

...