Today the children of the “Zdravushka” city rehabilitation center were told about the origin and development of life on the Earth. The environmental awareness-raising event during the decade timed to the International Day of Persons with Disabilities was conducted by specialists from the Ministry of Ecology and Natural Resources of the Republic of Tatarstan and employees of the Museum of Natural History of Tatarstan of Kazan Kremlin museum-reserve. As part of the lesson, the children learned what the first living organisms were, and were able to personally see the ammonite shells that have survived to our day.