Today we learned that the older a patient is, the more adipose cells you can find in a section of their bone marrow. You can approximate a patient’s age in this way – if the bone marrow is about 50% adipocytes, the patient should be about 50 years old.
One guess as to whether this led my female friends to:
a) Remark that that’s an interesting bit of trivia, OR
b) Freak out about how their bone marrow will get fat.
… Yep. That happened.
Action Potential 
Haha, that picture is basically the exact face I was making before I scrolled down to it.