most (not all, some contributions are QTVR-only due to historical reasons)
many, but depends on photographer's choice of file upload (newer event = more likely to work) and your device's capabilities. You may experience slow playback, distorted images or unexpected browser quitting if there is only limited memory/GPU power available.
I have always admired Nikola Tesla (1856-1943) - he was the man who tamed electricity. His name is used as the unit for the density of the magnetic field.
Tesla was a mysterious person and even today, many of his doings are hard to understand. He discovered the polyphase system, researched high frequency currents and he formed the first conceptions of the global radio system and wireless transmission of energy. The fact is that almost all Tesla's inventions originate from before his 45th birthday, later there was not much to be heard about his work. Rumor has it, that he did in fact come to some astonishing discoveries that were too amazing or too important to become public knowledge. After his death, those inventions supposedly ended in the vaults of the government of US...
This pano displays an operating Tesla coil, which is part of the exhibition on Life and Work of Nikola Tesla at the Technical Museum of Slovenia.