Time: 02:10CR - school - chemistry - laboratory - test tubes - sodium explosion
Time: 15:31CR - industry - science - chemistry - laboratory - scientist - flask - test tube
Time: 02:27CR - education - school - chemistry - physics - test - experiment - liquid nitrogen
Time: 03:15CR - Prague - science - education - chemist - laboratory - test tube - experiment - student
Time: 02:15CR - Prague - people - rescuer - education - teaching - protective clothing - chemist
Time: 08:49CR - business - hypermarket - supermarket - goods - food - chemist´s - cashier - cash register - shopping
T|ime: 06:14CR - education - school - medical - chemistry - anatomy - test tube - plastic model
Time: 09:15CZ - trade - supermarket - goods - chemist´s - food - beer - stocking shelves
Time: 03:30CZ - education - Brod - laboratory technician - chemistry - experiment - test tube - burst
Time: 10:35CZ - education - Ledeč - observatory - telescope - microscope - chemistry - experiment - mathematics - Guinea pig
Time: 07:42CZ - science - research institute - laboratory - chemist - solution - test tube - experiment - chemicals
Time: 07:27CZ - Prague - education - SOS - chemical - laboratory - experiment - chemist - slow motion - fire