D for DACTYLOLOGY

Dactylology, often referred to as finger spelling, is the representation of letters and numerals using only the hands (Wikipedia). The finger alphabets or hand alphabets, have been used in deaf education, and have been adopted by a number of sign languages around the world. For those of you who may not know, there isn’t one universal sign language, there are about 200 different sign languages used around the world today. The American Sign Language (ASL) is one example.

The following videos are songs interpreted using ASL. I think both of these individuals signing are amazing. Watch how they not only sign with their hands but also use facial expressions to convey emotions in the songs. Since I was a kid, I've always been interested in learning sign. I know it takes a lot of work and practice, but maybe one day I'll get serious about it and learn sign language. 

Oh, and just a heads up, you may have to click the Watch on YouTube  link in the first video. Sometimes it works right off the bat and sometimes I get a  restricted from playback message. But if you have time, do check these out, I think both interpreters are impressive and very nice to look at. (; 

Skip to 0.55 seconds if you want to go directly to the start of the song.

Other dang interesting D_ology words:

Deltiology: The study and collection of postcards.

Dysteleology: The philosophy that existence as we know it, has no cause or purpose or inherent goal. Dysteleology is also described as a form of science-oriented atheism.

Dendrology: The study of trees.