Yes, there is a light, and it does cast shadows. However, it is infrared (IR) which is a wavelength of light outside of the visible spectrum. It is invisible to people and owls. The camera, however, has a sensor that is sensitive to infrared light, so it “sees in the dark”. An article on the subject is at http://en.wikipedia.org/wiki/Infrared
A way to understand IR is to recall that a prism breaks up “white” light into its constituent colors. Different colors correspond to the wavelength of the light. At the short wavelength end of the rainbow is blue and violet, then ultraviolet is beyond that – this is the type of light that gives you the worst sunburn. On the other end of the spectrum are the long wavelengths, such as red and then infrared. We can only see the spectrum of light between red and violet – but there is “light” or electromagnetic energy, above and below these limits that is visible to some creatures and equipment. Thanks for a great question!

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There are sometimes issues with different browsers on issues on different platforms. What are you using (phone, PC, Macbook), (Android, iOS, Windows, OSX), and what are the symptoms?

There are sometimes issues with different browsers on issues on different platforms. What are you using (phone, PC, Macbook), (Android, iOS, Windows, OSX), and what are the symptoms?

Is it my imagination, or is she sitting with a different “posture” now?