Павел Николаев “Деревянные постройки Раннего Средневековья“
6 months ago 00:17:23 1
6 months ago 00:03:50 1
6 months ago 00:08:10 1
6 months ago 00:08:59 1
6 months ago 00:03:36 1
6 months ago 00:00:54 1
6 months ago 01:26:09 1
6 months ago 00:00:00 1
6 months ago 00:17:56 1
6 months ago 00:20:51 1
![Самая простая нерешённая задача — гипотеза Коллатца [Veritasium]](https://sun9-58.userapi.com/AooFjOGl1-XEHhwZNu0iF17j1HTqNDOZpymaHw/7dnwQoxPwGw.jpg)
6 months ago 00:48:03 1
6 months ago 00:12:18 1
6 months ago 01:12:04 1
6 months ago 00:46:49 1
6 months ago 00:37:27 1
6 months ago 01:40:15 1
6 months ago 00:03:44 1
6 months ago 04:04:42 1
6 months ago 00:02:57 1
6 months ago 00:03:55 1
6 months ago 00:16:48 1
6 months ago 00:03:40 1
6 months ago 00:04:02 1
6 months ago 00:15:08 1
![Биохимия фотосинтеза: #1. Фотосистема II [This Glorious Clockwork]](https://sun9-17.userapi.com/8P2fUOBTlagDWiOlpOm9kacs2rN-d8SPr8wY3w/ReNNJHZ4XAg.jpg)