TANZANY

They come from constellation Perseus, near the star Gorgonea Secunda.

They have caused thousands (maybe millions) of deaths on Earth and other planets as one of their interests (or area of "study") is how other races react to tragedies and cataclysms.

Technologically they are extremely advanced.

One alien race reported that they (the Tanzany) caused both the crashing of the Hindenburg as well as the sinking of the Titanic.

They can live up to 500 years and are around 1.7 meters tall (5').

They are avoided by other alien races.

Last sighting: January 1999 in New York state.