CO2 helps photosynthesis. It would probably keep increasing up to 100 percent assuming the light was on. The plant probably needs O2 at night. They generally don't make greenhouses more than about 1000 ppm because the improvement isn't worth the cost of pumping in all that extra CO2. The...
We didn't really just appear. The oldest fossils that also fall into the range of modern humans are called anatomically modern humans and they are about 200,000 years old. The 60,000 years is a very common estimate when some modern humans left Africa. All humans share a female common ancestor...
The shape of the skull is a main difference. The neanderthal skull is longer from front to back with an occipital bun. It is also lower and lacks the prominent forehead. They also have more pronounced brow ridges, a very large nasal cavity and larger rounder eye cavities. They lack the...
a. Irving Gill and Richard Neutra The question is apparently asking about architecture with both being early modernists architects from SoCal. They are earlier than Wright. It seemed like a strange question to me to assign modernism to anyone in particular...
Tree shrews are commonly thought to be the immediate ancestors of all primates. Some even classified them as primates. Genetic evidence would suggest that they should be considered as not primates since they are more distantly related than flying lemurs. There is much time between the...
Before about 5 years ago it was more common to call African erectus ergastor and Asian "erectus" erectus. They found one in Africa with intermediate characteristics so most decided they must be variations of the same species. It is wise and necessary to look into what causes speciation and how...
It gave him warmth and cooking made food much easier to eat. It probably also added security by adding light and discouraging predators. It probably also had other uses like curing meat or hides and keeping bugs away.
I would assume they want you to discuss the evolutionary lineage of modern humans or otherwise known as Homo sapiens. Human evolution is basically the same as other animals but there is one major difference. We have a very complex culture and the evolution of our culture has a great impact on...
We don't really know why they went extinct. It is likely that we took over the best territory and directly hunted and killed them. We probably mostly caused the extinction of the other members of the genus Homo. We would not be very tolerant of spear throwing hominids. I would imagine that...
Culture isn't really known and even tools are disputed.
http://www.ecotao.com/holism/hu_habilis.htm
http://www.mnsu.edu/emuseum/biology/humanevolution/habilis.html
http://www.archaeologyinfo.com/homohabilis.htm
http://anthropology.si.edu/humanorigins/ha/hab.html
I am fairly convinced that they exist because I had an encounter at Bluff Creek about 20 years ago. I believe they are in the same lineage as floresiensis. It is likely one of the habilis that split of from modern humans about 2.5 million years ago. The Hobbits have a very distinctive and big...
That is debatable if georgicus is actually the same species as ergaster. It certainly wasn't the first Homo. That would be a habilis or rudolfensis. Floresiensis is likely descended from early Homo and not eerectus. That would mean that most likely an unknown lineage existed or some erectus...
It is possible they contributed something before they went extinct. Other than that possibility, they aren't our ancestors They don't seem to have contributed much if anything to our genes.
Very interesting and ironic video.
The oil companies should be allowed to push their product. It isn't wise allowing them to have any control on alternatives because they have vested interest in producing cheap oil. That is what they should continue to do and let other companies compete...
I wouldn't put to much into that. Cold air masses can stay over an area for months. It isn't a long enough time to conclude anything about warming or cooling climate. Don't let people tell you it is warming when you can tell that it is not though. Don't throw common sense out the window but...
It is absolutely not relevant. The snow pack is slightly below normal, I believe. It has been decades since it was below normal so we are long overdue just from a statistics point of view. If the recent "warming" is any indication, the snow pack will improve.
It doesn't because the compounds don't make it high enough into the atmosphere in significant concentration. There is a disproved theory that the chlorine ion would be striped off and catalyze the conversion of ozone to oxygen in the upper atmosphere. In the 1970's, environmentalists managed...