I lean towards the scientific (and love Kendall's mathematics one!):

There was a young fellow from Trinity
Who took the square root of infinity
But the number of digits
Gave him the fidgets
He dropped math and took up divinity.

There was a young fellow named Fiske
Whose fencing was exceedingly brisk.
So fast was his action
The Fitzgerald contraction
Reduced his rapier to a disk.

There was a young fellow named Fred
Had a tool with a corkscrew shaped head.
He found, having hunted,
A girl corkscrew c**ted
But, alas!, with a Fred-reversed thread.

Bat Goddess