Pomology is the study of edible fruit. Carpology is the study of fruit whether they are edible or not.

Common fruit
Tomatoes, as everyone knows, are fruits not vegetables. Fewer people know that avocadoes, pumpkins, coconuts, cucumbers, peas, beans (green as well as all other beans), peppers, corn, aubergines, squash and all kinds of nuts are also fruits.
The frilled shark holds the world record for the longest pregnancy in nature: three years.
One of the exhibits at the Great Exhibition of 1851 was a vacuum coffin that preserved the body long enough for far-flung friends to attend the funeral.
For some unknown reason, people nearly always cut apples in half vertically. If you cut one in half horizontally, the core makes the shape of a perfect five- pointed star.