There's microscopic details, and very shallow depth of field, so the nut and bolt was drawn through a lens, if not from a macro photograph.
Why isn't the artist visible in the reflections in #6? When Escher drew "hand with reflecting sphere" he drew every detail, including himself.
What is reflected? Is that a Japanese toilet, or ... a go-kart with a bucket seat?
What does the Casio use bluetooth for? (I searched and found out, it just lets you change the time via an app. Turns out you can buy absurdly expensive premium Casios, although they look much the same as cheap ones.)
Why isn't the artist visible in the reflections in #6? When Escher drew "hand with reflecting sphere" he drew every detail, including himself.
What is reflected? Is that a Japanese toilet, or ... a go-kart with a bucket seat?
What does the Casio use bluetooth for? (I searched and found out, it just lets you change the time via an app. Turns out you can buy absurdly expensive premium Casios, although they look much the same as cheap ones.)