Skith

Biology
The Skith where made up of Ice Shards and Ice Bodys. They where very thin and you could almost see through one. They had to the power to shoot Ice Shards out there hands this was there main defence system. (DWM: The First)

Life Cycle
Not much is known about there life cycle but all the Skith seen have been male.

History
The Skith first invaided in 1915 and interupted the excibtion of Ernest Shackleton. They came to Earth to experiemnt on the human race. There plan was twarted by The Doctor and his then companion Martha Jones. (DWM: The First)

They returned to Earth in the early 21st Century and met the Doctor and Majenta Price. They where defeated by them as well. (DWM: The Age of Ice)

Trivia

 * The Skith are the Second Ice Based alien to appear in the show the others have been the Ice Warriors.