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03:18
The Problem With Concrete
4
B1
07:43
Michelangelo & The Science of Fresco Painting | Chemistry Meets Art
6
B2
08:06
3 Types of Rocks | #aumsum
36
B2
06:17
Cement: A Really Hard Problem
1
B1
02:41
Chemical Sedimentary Rocks
28
B2
04:06
Calcium Carbonate - Disintegrating Quicklime
367
B2
06:54
Exploring the Step Pyramid, Ancient Egypt's "Stairway to Heaven" - Dr. Zahi Hawass
121
B1
01:04
What causes Sinkholes? | #aumsum
55
B2
09:22
Exploring the Coral Reef: Learn about Oceans for Kids - FreeSchool
68
B2
05:20
Mammoth Cave National Park
3
B2
04:02
Reef Life of the Andaman - Part 1 - Introduction & Corals
297
B2
01:38
The Hidden Metropolis Beneath Kansas City
47
B2
04:39
3 Types of Rocks and the Rock Cycle: Igneous, Sedimentary, Metamorphic - FreeSchool
122
B2
00:46
60% of America’s #mushrooms come from this one farm in #pennsylvania. #foodinsider #shitake #farming
5
B2
06:54
Is Concrete Destroying Our Planet?
36
B2
06:31
How Were the Pyramids Built?
451
B1
51:46
Austraila's Great Barrier Reef - National Geographic (With Subtitles)
90
B2
01:23
A Healing Castle of Fluffy Cotton ... Or Is It?
6816
B1
07:02
Asking New York Millionaires How To Make $1,000,000
34424
A2
01:16
Casino mogul Sheldon Adelson buried in Jerusalem
5
B2
06:18
Gibraltar Vacation Travel Guide | Expedia
307
B2
06:18
ジブラルタル旅行ガイド | エクスペディア
49075
B2
07:05
The Mystery of the Pyramids' Construction
47
B2
01:33
ESC1000L - Calcite
53
B1
03:01
Khao Lak - City Video Guide
1037
B1
03:14
Kinabatangan River, Malaysia (1080HD) Travel Video
134
B2
11:31
Precipitation Reactions: Crash Course Chemistry #9
214
B2
04:44
Top 10 New Species and the First Fusion Reactor
44
B1
02:15
Archaeologists recreate tiles from time of Jesus
5
B2
03:49
Rock Cycle Rap Song
98
B2
10:04
The Hydrologic and Carbon Cycles: Always Recycle! - Crash Course Ecology #8
295
B1
05:51
Megatsunamis: World's Biggest Wave
3
B1
14:04
Blue Hole Diving In The Bahamas | JONATHAN BIRD'S BLUE WORLD
110
B1
11:02
How Much It Would Cost to Build Famous Landmarks Today
4
B1
10:20
The Essential Guide to Visiting Pamukkale and Hierapolis in Turkey (2021)
19
A2
02:49
Investigating Where Jesus Was Crucified | Expedition Unknown
3
B1
02:41
Introducing Wales
2
B1
03:39
The Evolution of Ancient Egypt's Pyramids | Lost Treasures of Egypt
34
B2
02:37
Cats through the ages: Ancient Egypt – episode 3
39
B1
04:55
Guadalupe Mountains National Park
4
B2
04:01
The Inventor of the First Pyramid | Lost Treasures of Egypt
24
B1
04:15
A Peek at the Peak - Mountain 1 | PLUM LANDING on PBS KIDS
5
B1
11:09
What is Physical Geography? Crash Course Geography #4
12
B1
13:36
The History of Iron and Steel
12
B2
06:55
Geibikei Gorge | Japan
2
A2
04:22
Land of the Bible: Wadi Qelt: the road from Jerusalem to Jericho
42
B2
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