Mark was an extreme scientist. He has written more than thousand publications in different fields of science, has held many positions and was not afraid to take on work. When he joined our institute, he did not want to become an honorary member. He wanted to do research and convinced me to do a project together on a Single Integrated Science of Information (SISI). When I took the photo above in Berkeley in 2019, his eyes were the eyes of a youngster who spread freshness looking forward to co-operation. He never tried to gain an advantage at the expense of others. He had a calm nature and was not vain, although there were no questions to which he did not know an answer to.

He died in the midst of his work at the age of 77.

Have a closer look at his vita here. Find also here an obituary of close colleagues.