Partialheimers

Partialheimers: noun. A medical condition, where the symptoms of Alzheimer's disease present themselves in a patient, who is much too young to suffer from the disease and they also aren't all of the symptoms. This particular disease was most prominent in the 18th century, where it happened to plague the majority of the Arabian peninsula and lead to what is known as "The Great Forgetting". It was later discovered that the disease is caused by a particular virus, which is transmitted from eating sand. It was then quite straightforward to eradicate the disease. And that is how the Sahara desert came to be.