Heron’s Fountain. IYPT 2018. Problem 4
Heron’s Fountain is a hydraulic machine invented by mathematician and physicist Hero of Alexandria who lived in the 1st century AD.
If to watch wat...
4 months ago 01:13:58 1
5 months ago 00:03:07 1
![Morality Lesson - Will Stetson [MV] 【HSR Fansong】](https://sun9-16.userapi.com/W3_2zCipEVZ8tBBtvAgyk-Erf2AtNvblQzTKpg/n7y3qYO75cI.jpg)
5 months ago 00:08:33 1
5 months ago 03:05:00 1
6 months ago 00:00:52 1
6 months ago 00:03:08 1
6 months ago 00:19:19 3
7 months ago 03:09:04 1
8 months ago 02:04:57 32
8 months ago 00:03:11 2
9 months ago 00:06:39 1
9 months ago 01:00:43 1
![Dubai [4K] Amazing Dubai Mall. Burj Khalifa, City Center Walking Tour 🇦🇪](https://sun9-19.userapi.com/PQpAhgFnXj7s1u2a9NOx_rQHIsp_liCiKf0peQ/I2Mc_OS8Xig.jpg)
9 months ago 00:08:21 1
9 months ago 00:03:11 2
9 months ago 00:58:42 1
![Dubai [4K] Amazing City Center, Downtown Dubai Walking Tour 🇦🇪](https://sun9-39.userapi.com/lu3FGT0pppsl0fPwZxwU3mvjthfGbI5jWvJ_KQ/3-e0jbOOcHo.jpg)
9 months ago 00:09:09 1
9 months ago 03:02:55 1
10 months ago 00:00:43 1
10 months ago 00:01:18 1
10 months ago 00:03:42 1
10 months ago 00:00:00 1
10 months ago 11:54:59 1
11 months ago 02:05:21 1
11 months ago 00:00:19 2
