I was reading this paper on proteomics on mussels
which they collected tissue samples from the foot of the mussels

After 30 mins of reading
I felt so retarded to only realise what they have been describing
They collected tissue sample from the FOOT of the mussels

Err... mussels have foot?

Yes they have!

In fact they can move too!
I've seen so many of them sticking onto rock surface with their threads
Never did I know that they are mobile

Now
What else have I not know?