@@MichelvanBiezen In another video, you said that carbon dioxide molecule are not a dipole moment and therefor will have less interactions or degrees of vibrations. In addition, that water vapour in the atmosphere is better at absorbing energy than carbon dioxide water vapour is responsible for about 90 percent of what we call greenhouse effect in the atmosphere and carbon dioxide about 10 percent. Also the two overlap, surely this rules out manmade greenhouse effect?
It doesn't rule it out completely, but the greenhouse effect of CO2 is far less than is being advertised. And the fact that CO2 already absorbs all of the radiation it can absorb (in the frequency ranges that it can absorb), increase CO2 will have a limited effect.
Thank you again, Dr. van Biezen, for a not only a science lesson, but a history lesson! You used the term "adventurous" to describe those scuba divers that entered and followed the cave all the way back - that is definitely an understatement in my estimation! I'm not claustrophobic but I know I would not have the nerves to go that far back into an unknown passage even if it wasn't underwater.
So it was during the end of the ice age before the glaciers started to melt that access was open? Looks like several of the paintings have been scratched off.
Yes the painting were dated to be about 18,000 to 25,000 years old. The oceans began to rise around 18,000 years ago and the entrance to the cave must have dissapeared under the water about 13,000 to 14,000 years ago.
Back when the oceans were much lower, they could just walk into the cave. Since all caves have air in them, there is no problems with breathing in a cave. Yes, the only method for light back then was torches for light. They learned how they could keep a fire going on a stick to provide light.
@@MichelvanBiezen The angle of the entrance means all the gases from the fire would go up and get trapped and fill the cave with dangerous gases though.
Gases tend to mix evenly and will therefore not collect in a single region. But there is no doubt that the air would not be healthy to breath, just like standing around a campfire subject you to breathing smoke filled air.
The world has been flooded many times if your talking about the middle east all through there used to be a mega ocean turned mega lake leaving the arel black dead and Mediterranean sea
Are all of the visible drawings today near the little island i the middle of the cave? If not, the drawings would have been meters above the ground back then.
Dogger bank is indeed a fascinating topic both as a historical site regarding climate change and the location of a vast new development of wind power. We added it to the list of topics to cover.
Sir,I love your videos. You are a pioneer for me as a physics teacher.when you are being said why you are using whiteboard despite using modern tools,just say go to hell.From Bangladesh.(hope you heard about my country)
Bangladesh is known around the world. The people are very hard working there, trying to pull the country ahead. We have a lot of students from Bangladesh watching our videos. 🙂
Hey nice video Michel and thanks for the video. Just curious the people that lived in that cave back then was it Humans like us or was it the neanderthal people?
Neanderthals are believed to have become extinct about 40,000 years ago, which would put them at pre cave drawing times of those caves discovered in Southern France which were dated to 20,000 to 25,000 years.
We don't say BP but before Christ, BC, or before Christ era, you are a revisionist. There are also no miles in France! And STOP calling ocean the Mediterranean sea! That's obvious ignorance!
Natural reasons!!! Good video!!!
Yes, a key fact often overlooked. 🙂
@@MichelvanBiezen In another video, you said that carbon dioxide molecule are not a dipole moment and therefor will have less interactions or degrees of vibrations. In addition, that water vapour in the atmosphere is better at absorbing energy than carbon dioxide water vapour is responsible for about 90 percent of what we call greenhouse effect in the atmosphere and carbon dioxide about 10 percent. Also the two overlap, surely this rules out manmade greenhouse effect?
It doesn't rule it out completely, but the greenhouse effect of CO2 is far less than is being advertised. And the fact that CO2 already absorbs all of the radiation it can absorb (in the frequency ranges that it can absorb), increase CO2 will have a limited effect.
Thank you again, Dr. van Biezen, for a not only a science lesson, but a history lesson! You used the term "adventurous" to describe those scuba divers that entered and followed the cave all the way back - that is definitely an understatement in my estimation! I'm not claustrophobic but I know I would not have the nerves to go that far back into an unknown passage even if it wasn't underwater.
I wouldn't either. They are brave people.
Absolutely fascinating. Thank You for lesson on the Discovery!
Can you imagine being the scuba diver who discovered the cave!?!
Yes, that and all discoveries where someone see things the first time . Thanks to your lectures, we see it everyday!
This is beautiful. Indeed
Thank you. 🙂
Could have more caves like this one near by ?
The caves of Lascaux are probably the most famous.
So it was during the end of the ice age before the glaciers started to melt that access was open?
Looks like several of the paintings have been scratched off.
Yes the painting were dated to be about 18,000 to 25,000 years old. The oceans began to rise around 18,000 years ago and the entrance to the cave must have dissapeared under the water about 13,000 to 14,000 years ago.
Nice video! Cave diving seems super risky.
Very!
Excellent ❤❤❤❤
Thank you.
How did they see in there? If with fire, how did they breathe in there?
Back when the oceans were much lower, they could just walk into the cave. Since all caves have air in them, there is no problems with breathing in a cave. Yes, the only method for light back then was torches for light. They learned how they could keep a fire going on a stick to provide light.
@@MichelvanBiezen The angle of the entrance means all the gases from the fire would go up and get trapped and fill the cave with dangerous gases though.
Gases tend to mix evenly and will therefore not collect in a single region. But there is no doubt that the air would not be healthy to breath, just like standing around a campfire subject you to breathing smoke filled air.
So cool I love stuff like this
Glad you found our videos. 🙂
If the oceans where that shallow then why are so many marine fossils are found in the dessert
The world has been flooded many times if your talking about the middle east all through there used to be a mega ocean turned mega lake leaving the arel black dead and Mediterranean sea
If your talking about the ones in Africa, Africa was turned to swamps many times and some parts being covered by lakes
Tectonics?
Are all of the visible drawings today near the little island i the middle of the cave? If not, the drawings would have been meters above the ground back then.
I believe some drawings are under water and have thus been destroyed.
@@MichelvanBiezen Yes, I know. I am curious about how high the above water ones are.
Some are very close to the water and some are several meters above the water and a number are below the water and are lost to history.
Cave diving one of the most dangerous things you can do
Yes. Remember the cave rescue of the 12 boys of a soccer team in Thailand. Those divers were true heros.
@@MichelvanBiezen They were seriously brave
Do a lecture about dogger bank
Dogger bank is indeed a fascinating topic both as a historical site regarding climate change and the location of a vast new development of wind power. We added it to the list of topics to cover.
Thanks for sharing that with us ! 👍
Our pleasure! 🙂
That's great thnku
Most welcome 😊
🙂👍thank you
You're welcome 😊
Sir,I love your videos. You are a pioneer for me as a physics teacher.when you are being said why you are using whiteboard despite using modern tools,just say go to hell.From Bangladesh.(hope you heard about my country)
Bangladesh is known around the world. The people are very hard working there, trying to pull the country ahead. We have a lot of students from Bangladesh watching our videos. 🙂
❤❤❤❤❤
Thank you.
Don’t tell Mr. Musk! 🤓
What do you think he would do?
@@MichelvanBiezen send a sub.
Lol!
Hey nice video Michel and thanks for the video. Just curious the people that lived in that cave back then was it Humans like us or was it the neanderthal people?
Neanderthals are believed to have become extinct about 40,000 years ago, which would put them at pre cave drawing times of those caves discovered in Southern France which were dated to 20,000 to 25,000 years.
We don't say BP but before Christ, BC, or before Christ era, you are a revisionist. There are also no miles in France! And STOP calling ocean the Mediterranean sea! That's obvious ignorance!
The Cave of Cosquer is indeed at the coast of the Mediterranean Sea
Lol at a Christian accusing anyone of being a "revisionist"