The spine surgeon may go for an operation. He may go for some type of discectomy operation to relieve you of the pain.
The most likely explanation is that the necklace was causing you discomfort in your sleep. The dream was caused by the discomfort and expressed your effort to relieve the discomfort.
Endorphins
Herniated disc that are not pressing on a nerve, may be lower back ache to no symptoms. A herniated disc that is hitting a nerve, may cause weakness, numbness and or pain in the area or path that the nerve travels. If your herniation is in lumbar (lower) you may start to get a sciatica. This is caused by pressure on the sciatic nerve, that shoots pain through buttocks and down the leg and can also cause lower back and leg pain. When herniation is in upper lumber located near bottom of ribs, then your thighs could possibly hurt. Herniation in the neck can cause numbness and or pain in chest, shoulders, and or arms.
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Extinction is most likely to be caused by environmental conditions. Dramatic changes to the climate can mean that species are no longer adapted to survive.
seafloor spreading
Over steering.
No.... It depends on what virus caused it but most likely no.
The most likely cause would be that the dog's feet are itching and that is a way for them to relieve the itching.
B) Genetic tests for defects were performed prior to birth.
photosynthesis
Lungs.