Bhagat made the posters to celebrate Science Day in India.
This is the weakest of the bunch.
UPDATE: You all are right, it is the strongest one.
This is why I shouldn’t start work at 6:30 am.
Related to Archimedes’ work with levers and fulcrums, of which the Greek scientist said: “Give me a long enough lever and a place to stand, and I will move the earth.”
The right triangle of the Pythagorean theorem.
Wilhelm Röntgen discovered X-rays.