long as they have a clear picture of what a particular place looked like (or will look like) at the desired time. However, the practice is highly dangerous to both dragon and rider and is severely restricted. Existing in two places at once for extended periods of time, or in close proximity, causes severe weakness and psychological disturbance for humans but not for dragons, the effects of which are discussed in several novels. In addition, while teleporting through space always takes the same amount of time, when a dragon travels through time, the amount of time they spend in between increases depending on how far away in time the destination is. Thus, traveling to remote times poses severe dangers from hypothermia and oxygen deprivation. In the first Pern novel, Dragonflight, Lessa passes out after having travelled back more than four hundred Turns. The Dragonlover's Guide to Pern states that dragons defecate while between. This idea originated with a statement by Anne McCaffrey herself, in answer to a fan's question about the subject at a con. However, McCaffrey may have been joking when she first said this. As the idea has never been referenced in any of the Pern novels (in fact, defecation was mentioned only a few times in all of the books ever written in the Pern series), it cannot be considered definitively canonical. The Skies of Pern references the use of dragon dung as a repellent against the large felines inhabiting the southern continent. Dragons are also capable of telekinesis, though this ability is unknown and used in an unconscious manner (to augment flight) until it is discovered as a conscious ability by the green dragon Zaranth and her rider Tai in the Thirty-first Turn of the Ninth Pass. It is speculated that the undersized wings were intentionally created in the dragons by Kitti Ping to reduce the surface area of a dragon that is exposed to possible Thread injury, and that the telekinetic abilities were intended to make up for the loss of wingsail. It is said in many books that a dragon can carry whatever it thinks it can carry. This is likely an extension of the telekinesis, mentally "lifting" the extra load. This is the most likely explanation for the great loads that dragons sometimes carry during emergencies. Psychology Unlike their fire-lizard ancestors, dragons are fully sentient. They communicate fluently in human language (although only