A famous scientist at the blackboard with formulasA famous scientist at the blackboard with formulas
A black-and-white book lies next to a candle and a clockA black-and-white book lies next to a candle and a clock
A famous scientist at the blackboard with formulasA famous scientist at the blackboard with formulas
A black-and-white book lies next to a candle and a clockA black-and-white book lies next to a candle and a clock