Giraffes have the biggest hearts in the animal kingdom weighing in at 12 kgs. They also have powerful valves in their arteries to stop the blood draining from their heads. How do you know that dinosaurs did not have a similar setup?
Earth was actually bigger in the past, not smaller. The moon was part of Earth and a chunk was knocked off by an asteroid, which became the moon we know today.
The water we have on earth came from comets and possibly also the DNA for lifeforms. Without water, there would simply be lower ground. Nothing is floating, not islands, not continents.
There are many parallels btwn Jesus and Muhammad Similar Teachings of Muhammad and Jesus
One of the strongest indicators is that the same ppl hate both Muhammad and Jesus - why is that I wonder? - Is there a reason these same ppl promote hatred of both religions?
We have an elected Democrat Representative from the Great State of Georgia that may disagree with you. He opposed moving 8000 US troops from Okinawa to Guam because that may cause the tiny island to capsize.
Agreed, the teacher makes all the difference in the world. I had a history teach that absolutely loved the subject and it was her mission to make sure her passion rubbed off on as many of her students as possible. She made it a most enjoyable hour. It worked for me and remains my chief interest.
WTF is wrong with this mental midget?
I guess his district is full of ignorant sheeple cause he’s still their rep.
This is what you get when you gerrymander a district.
The height difference between the brain and heart is not more than 2.5 meters. And to ensure blood supply to the brain, the giraffe has special features we already mentioned, like extreme high blood pressure and powerful heart muscles.
The height difference between the heart and brain?
Giraffes may overcome the blood supply problem to the brain with the features we discussed, but will the long-necked dinosaurs with such measures?
I don’t think so.
Reptiles are very conservative creatures. They may grow very large, but their basic design doesn’t vary as much as mammals have allowed.
It’s a long read at 136 pages, but you should at least read the 9 pages of the executive summary of the last annual Pentagon report to Congress of China’s military capabilities and strategic military plans.
That is interesting about the moon. I had always assumed that the moon collided with earth and left a dent called the Pacific Ocean. If the moon was chipped-out by an asteroid that was one hell of a collision.
Yep, I wonder what the atmosphere here was like absent that gravitational pull. Obviously the earth has its own gravity, and maybe there was little or no difference other than tidal…
Ok … what is needed here is a little engineering understanding.
It is not necessary for the heart to pump blood up 15-metres of neck to reach a dinosaur’s brain. The heart merely circulates the blood. All that is required is that the blood is ‘there’.
It is true that, if the blood system is connected all around the dinosaur’s body, the blood vessels at the lower extremities would have to survive some elevated pressures. However the heart is buried somewhere within the body, supported by all the bones and other ‘stuff’, and is acting like a central heating pump, it just recirculates the fluids. The reason that it might have to be ‘big’ is because it would have to shift quite a volume of blood around a large body.
Finally … the blood vessels in a dinosaur’s legs might be quite small or narrow. This would allow them to sustain higher pressures with a reduced risk of rupture. It is only when the blood vessels are near the skin that damage is likely … as with human varicose veins.
Anybody know how big is the heart of a Blue Whale or similar?
Not exactly. The continents are joined together by those parts of the earth’s crust that are under water. If you could survive the pressure and carry enough breathable gases, you could walk a straight line from New York City to London on the bottom of the Atlantic Ocean.
The entire crust (including what’s covered by water) is supported by the molten core.
And it is the movement of this molten iron core or the movement of the crust relative to the core which provides the electro magnetic field that protects us from the cosmic rays. Even stood at the top of a mountain, you will get double the cosmic radiation you would get at sea level.
