Pseudogout is a joint disease that can cause attacks of arthritis. Like gout, the condition involves the formation of crystals in the joints. But in pseudogout, the crystals are formed from a salt instead of uric acid. Alternative Names. Calcium pyrophosphate dihydrate deposition disease; CPPD disease.
Every autumn, around three million Monarch butterflies will travel around 3,000 miles to inhabit the mountains of central Mexico or small groves of trees along Californiaâs coast.
In tropical lands, butterflies do migrate back and forth as the seasons change. At the beginning of the dry season, the food plants shrivel and the butterflies leave to find a moister climate. When the rains arrive, the food plants grow back and the butterflies return. How do monarchs know when to leave?