Studied for 30 years by the Russian psychologist Aleksandr Luria, he could memorise strings of dozens of numbers just by looking at a blackboard, recalling them with stunning accuracy months or years later and reciting them backwards or forwards.

• 他看一眼黑板就可以记住一连串数字，几个月或者数年之后还能极其精确地回忆出这些数字，倒背或顺背如流。 俄罗斯心理学家亚历山大 - 卢里亚对他进行了为期30年的研究。