Plant research has often been done with plants. In genetics, the breeding of pea plants allowed Gregor Mendel to derive the basic laws governing inheritance, and examination of chromosomes in maize allowed Barbara McClintock to demonstrate their connection to inherited traits. The plant "Arabidopsis thaliana" is used in laboratories as a model organism to understand how genes control the growth and development of plant structures. NASA predicts that space stations or space colonies will one day rely on plants for life support. Ancient trees are revered and many are famous. Tree rings themselves are an important method of dating in archeology,
Gregor and the Curse of the Warmbloods of the victims, he heads down to help with yet another of Bartholomew of Sandwich's prophecies. His mother, however, hates the Underland and only allows Boots and Gregor below on the condition that she comes with them. The humans' plague expert, Dr. Neveeve, explains that there is a plant called starshade growing deep in the Vineyard of Eyes which can be distilled into a cure. In the midst of the meeting, a dying bat infected with the plague inadvertently infects one of the delegates—Gregor's mother. Gregor immediately joins a group of creatures on a quest to find the starshade, as