Science
The first camera obscura was built by an Iraqi scientist named Abu Ali Al-Hasan Ibn al-Haitham, born in Basra(965-1039 AD), known in the West as Alhacen or Alhazen, who carried out practical experiments on optics in his Book of Optics. His method of experiments is then used to establish what is know kknown as 'scientific method,' a couple of centuries before the work of Isaac Newton.
Before the Photo Camera , There Was the Camera Obscura
Discovery that quasars don't show time dilation mystifies astronomers
The phenomenon of time dilation is a strange yet experimentally confirmed effect of relativity theory. One of its implications is that events occurring in distant parts of the universe should appear to occur more slowly than events located closer to us. For example, when observing supernovae, scientists have found that distant explosions seem to fade more slowly than the quickly-fading nearby supernovae.
