Zebra black and white at birth. Plains and mountain zebra foals are protected by their mothers, as well as the head stallion and the other mares in their group. Grévy's zebra foals have only their mother as a regular protector, since, as noted above, Grévy's zebra groups often disband after a few months. Attempts have been made to train zebras for riding, since they have better resistance than horses to African diseases. While occasionally successful, most of these attempts failed due to the zebra's more unpredictable nature and tendency to panic under stress. For this reason, zebra-mules or zebroids (crosses between
A Planet Called Utopia A Planet Called Utopia A Planet Called Utopia is a science fiction novel by Scottish writer J. T. McIntosh, first published in August, 1979 in New York by Zebra Books. It is the last book published by the author. Except for radio and television signals, which are tightly screened, it has been over sixty years since the last visitor was allowed into Utopia, a world where everyone was immortal. So that the world's population would not outrun available surface area, marriage has been outlawed (because couples start to want to have a child), lifelong romances discouraged (for pretty much the