Warmer temperatures would be beneficial

Why haven’t any huge animals evolved since the end of the Jurassic?


Warmer temperatures would be beneficial

By Bob Knows

During the Jurassic, huge animals and plant life flourished BECAUSE OF high temps.

All chemical activity is much more rapid at higher temperatures, and life evolved as adapted to higher temperatures. Very rapid plant growth caused by high temps and plentiful water and CO2 produced massive quantities of feed for huge animals.

Since that time plant species have adapted to very marginal temperatures just barely (sometimes) above freezing, and plants adapted to survive on marginal CO2 levels while freezing out for half the year.

The question was asked half a century ago, “Why haven’t any huge animals evolved since the end of the Jurassic?” There has been plenty of time.


Because there hasn’t been enough heat and food for massive animals. We’re a near-starvation species living on a near-starvation and nearly-frozen planet.


29 thoughts on “Warmer temperatures would be beneficial”

  1. and cos anything new n large would be eaten pdq in most places,
    things need to be left alone to mutate and develop and breed up
    in todays world thats a LOT hard.

  2. The real question is why have we not seen any increases in animal sizes since the end of the last major glaciation and extinction of mega fauna? Except for time limitations and poor record keeping that is. Did we miss something?

    1. We ate all the large animals we could! Wooly mammoths, wolly rhinos, giant sloths, giant wombats, rocs, moas, you name it!

  3. My seven-year old daughter gave the best answer to that question:

    “Oh I expect God looked at them, and thought ‘Nah, Too big’ she replied, ‘Let’s rub them out and start again.”

  4. This news item is a few days old but lest we forget, the southern hemisphere has its winter right now and Australia just got walloped with over a meter of snow:

    The AU BOM (Bureau of Meteorology) has also issued a graziers warning:
    Australian Government Bureau of Meteorology
    Western Australia

    Warning to Sheep Graziers for the South West forecast district.
    (Issued at 11:03 pm WST on Saturday 12 August 2017.)

    Sheep graziers are warned that cold temperatures, showers and northwesterly winds are expected during Sunday. Areas likely to be affected include parts of the South West forecast district. There is a risk of losses of lambs and sheep exposed to these conditions.

    Typically NW winds do not portend of colder weather because of the geographical positions of western Australia (cold winds come from the SW or south.) But looking at the current wind map at earth.nullschool.net one can see just how strong the system sitting off the coast of WA is, pulling in all of that cold air along with it.

  5. human beings may be the most important factor in no large animals evolving. the developing large predators would have been pursued to extinction as a safety measure. the developing large prey would have been pursued as a food source.

  6. I would agree with the statement that we are a near starvation specie,

    The productions of grains feed cows that produce meat and dairy products. If the production of grains were to stop, we are losing cow, pork and chicken as meat.

    Humans are also depends on potatoes as a main source of food.

    Vegetable are no produced in big enough quantities to feed the world and their production is not as mechanized as grains.

    If you lose grains and potatoes, the human specie is finished.

  7. gravitational differences must be taken into account, even if they seem slight, compounded, they account for a real size difference.

    1. The gravitational difference is not insubstantial. There is good evidence that 200 million years ago the earth had no oceans. It was about the size of Mars and its crust was 4 billion year old rock punctuated by shallow seas. Then it expanded at volcanic ridges that created the oceans and separated the lands.

      Take away the oceans and the continents fit together perfectly. Continents consist of very deep ancient rock but the relatively thin ocean bottom is all less than 200 million years old. With the arrival of very precise GPS the expansion was measured over a 27 year period, approximately 20 mm/year, which agreed with the calculations of geologists measuring the ocean beds.

      The resultant increase in gravity is important to land creatures. The tallest animal today is a 20′ giraffe because organic systems cannot pump blood any higher. A Brachiosaurus stood 40′-50′ high. The heaviest animal is a 10,000 lb elephant. Its 12″ leg has an area of about 100 sq in resulting in pressure of about 100 psi. A Brachiosaurus weighed about 140,000 lbs. Its 30″ leg has an area of about 700 sq in resulting in a pressure of 200 psi, clearly not possible if we agree both animals are made of similar organic materials.

      It would be impossible for a Brachiosaurus to live on earth today. So it must have lived on earth when earth was smaller.

  8. Today we have the biggest animal that has ever lived on Earth !

    This animal and its cousins were threatened by man hunting them for products that were easily replaced by hydrocarbons extracted from the Earth.

    It wasn’t that long ago that very large land animals – larger than today’s – roamed and that time was apparently an ice age.

    Nothing is simple.

    1. Absolutely correct. The Blue Whale and other whales were bigger than dinosaurs and they still exist. Meanwhile, incredibly obese humans, thanks to hormones, steroids, and genetically modified foods are displacing everything on the land surface. We are in the era of Mega-Humans.

      1. Just thinking out loud, and probably this is totally off the wall, but could the whales have survived a magnetic reversal because they were sea creatures, and perhaps were protected by the depth of the water from radiation?

    2. Large sea animals would be unaffected by increasing gravity and would be protected from abrupt earth changes such as asteroid collisions, volcanic cooling periods and massive solar blasts. I note that whales regularly migrate from one extreme to the other and appear quite at home in both where-as Wooly Mammoths probably could not cope with the abrupt end to the last glaciation, could not easily walk to warmer regions and were hunted to extinction.

    3. I suspect that some of the massive dinosaurs such as the brontosaurus were large swamp dwellers. If their gigantic bodies floated.

      Here’s my theory of what killed the dinosaurs over a period of several million years (which is true). The culprit: Antartica, or its moving onto the South Pole. When a large continent did so, it sucked up hundreds of feet of sea level. Thus the mighty swaps such as was on North America disappeared, do losing the main dinosaurs habitat.

  9. The Blue Whale is the largest animal to ever evolve on our planet… Unless a fossil has yet to be discovered which shows otherwise.

  10. This is Spot on. Carbon dioxide is our friend not our foe.
    They don’t inject CO2 into green houses for no reason they do it for explosive growth. I have been into fish keeping for years & i know for a fact that if you want a heavily planted ornamental aquarium with stunning growth you use strong light & inject large amounts of CO2 to achieve that & believe me some of these tanks are stunning.
    Anyone that thinks that a pissy bit of carbon dioxide is bad for us is delusional.
    We got bigger problems to worry about than CO2. Hell the even pump raw sewage int the sea, plastic rubbish floating around everywhere. Its washing up on our beaches here in australia.
    I don’t even think the public even understand what climate change actually is. they think its just caused by pollution.

  11. My favourite period is the Eocene, 56 to 33.9 million years ago. During this period of time, little to no ice was present on Earth with a smaller difference in temperature from the equator to the poles. Generally the global temperature was several (6-10’C) warmer than now. What is interesting is that this didn’t result in disaster for life (neither did the higher levels of CO2) flora and fauna flourished on land and in the oceans, what caused a mass extinction was a severe cooling and glaciation.

    I’d love to hear Al Gore’s explanation of that.

    1. While the dinosaurs apparently died out (mostly) 65 million years ago, many of the mammals that took their place in a few million years were enormous, with some of the large herbivores much bigger than even the mammoths that eventually came along, though none of the land mammals ever approached the size of some of the gigantic plant-eating dinosaurs. (They recently found bones of a new record-sized one, in Argentina, bigger than a 747.) Perhaps the high CO2 levels persisted for a few million years after the K-T event, which might account for the enormous mammals of that time. Since then, it seems that land mammals peaked in size and have gradually gotten smaller over millions of years, long before the (accepted) date that humans appeared.

  12. Today there are large, useless land areas (Antarctica, Greenland, Siberia) due to low temperatures. Short sea-routes around or through the Arctic are unavailable due to sea-ice. Warmer global temperatures would be good, why try to oppose it?

    1. Good question! The earth’s net gravity was possibly less than now in the geological past. This could be the result of earth gravity partially neutralized by either the moon in a closer orbit, or the earth orbit around the sun being smaller. Other alternatives are an earth orbit closer to the giant planets, or a now destroyed planet occupying the asteroid belt. The solar system may not be as stable as astronomers’ apparent consensus.

  13. A few years, a study was published reporting the optimum temperature for human life. The study reported a temperature in between 60 degrees F. to 64 degrees F. (I do not remember the exact temperature) as the optimum temperature. The deaths of humans rose when the temperature rises or falls below this optimum temperature.

  14. While I definitely agree about carbon starvation and the cold state the planet is in, you might better have not mentioned animal sizes. The idea is mistaken. There have been some very large mammals over the course of the Cenozoic (post-Cretaceous). One particular beast, the Baluchitherium (now called a Paraceratherium) was a member of the Indricotheres. A mature example could stand nearly five meters at the shoulder, and could run over seven meters long, and weighed 15 to 20 tonnes. So this animal would have weighed roughly twice as much as a tyrannosaur and stood taller on four feet than the T. rex did on two. For a land animal in any era that is huge.

    During the depths of the Pleistocene the Columbian mammoth stood about 14 feet high at the shoulder and weighed roughly 10 tonnes (massing about the same as a T. rex). These animals were walking around in the depths of the Pleistocene cold in a period of the lowest primary productivity in the last 300,000,000 years. Right now animals are somewhat smaller. But the largest animal ever, the blue whale is not extinct yet.

  15. Actually …

    Have you guys thought about the relative land mass around the equator, compared with temporal zones.

    If we had a serious climatic cool down, could the temporal zone move to the equatorial zone? The equator is plagued with monsoons such that they are no good for planted major breadbasket crops. Of course there would be three miles vertical ice in North American and European capitals, but what about the opening up of those desert zones? Ie the replanting of the Sahara, no less.

  16. None of the large birds or dinosaurs can exist with the gravity force it is today. At the time of their existence gravity on this planet was much lower. This is easily verified by physics. Their extinction is most likely due to the change in gravity rather than the modern science fantasy. And by the way obesity and large humans is an American problem, not a human problem,

    1. As Antartica moved over the South Pole, it accumulated ice such that the sea level dropped hundreds of feet. This drained the large swamps which was the habitat of dinosaurs. This version of the dinosaurs had them rearranged as giant crocodile creatures that floated rather than the ridiculous giant legged physics failures. The elephants are the biggest four legged creatures in one G gravity. Changing gravity is cheating.

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