volcanoes are of different kinds. the ordinary volcanoes at the edge of oceanic plates and the shield volcanoes. can you tell me what are shield volcanoes and why do they occur? they seem to have had an effect on life- the Deccan shield and the Siberian shield eruptions were contemporary to two...
rocks are very good thermal insulators. so even though centre of the Earth is very hot its effect on surface temperature is insignificant. surface temp of Earth depends primarily on solar radiation and heat trapping property of CO2, water etc. so when greenhouse gases increase, Earth's surface...
recent studies seem to have shown a rapid meltdown of arctic ice cap. it is also being predicted(i saw this in the news) that melting is so rapid that arctic icecap would vanish in 100 years (about). so it seems the planet is warming. now the question is why? the standard explanation is due to...
i have voted for serious. quite apart from global warming, nobody i believe has failed to notice that percentagewise natural ecosystems has become a minority and human induced artificial ecosystems dominate the world. this trend is unlikely to be reversed in the near future and would cause major...
yes, but selfcorrecting in million year time scales. it took 50 million years for biodiversity to stabilize after permian mass extinction. want to wait that long? among the 90% species that will die out in the next major extinction event(when it happens) do include homo sapiens sapiens on the list.
joahua if you are still there.it is simply not true that cambrian explosion was as sudden or rapid event as it's often made out to be.consider the facts presented in the link below talkorigins.org/origins/postmonth/dec97.html .well link isn't working. so here's the entire post.
in...
universe always existed in some form or the other. it evolved according to laws of physics. nobody created the universe and hence there is no god.we have no intrinsic purpose of existence, and hence are free define one for ourselves.
why do so many people in America refuse to believe evolution?they instead cling to the idea that life on Earth was created by god as told in the bible. is it so difficult for people to at least entertain the notion that bible can be wrong?that it may be a book written by men like you and me and...
as far as i know, according to current models, ice giants like uranus and neptune would never have formed.since they are there,planetary accretion theory needs a lot of revamp.anyway, what's wrong with current plate tectonic theory?also i do not understand why material will sink back in a...
some new developments.the key point it seems is the presence of liquid water.venus in its early days was too hot(unlike earth)to hold liquid water. so all its water (comparable to the entire volume of water present in Earth's oceans today) was in the form of steam in the atmosphere. now absence...
according to your rapid polar wander theory, ice ages did not happen. hence net volume of ice on Earth does not vary significantly through time.however how would you then explain the large variations in sea level that were experianced throughout the holoscene epoch?
what are DRAGNs meteor?
aren't neutrons on their own, a very unstable particle?then how do they remain stable within a neutron star?every galaxy seems to have a supermassive black hole at its core-so why are they active within the quasars only?
quasars are highly active but extremely distant galaxies, right?what kind of galaxies are they and do they represent an earlier stage of the lives of the conventional galaxies?i've a vague idea that quasars a galaxies in which the supermassive black holes at the centres are actively gobbling up...
so what they are saying in effect that the experiments are biased due to non random sequencing of trials. that is possible. are there any other examples of skeptics performing ESP experiments and finding negative results? he has also done some experiments with parrots and peoples ability to...
heard of rupert sheldrake? he seems to be a very respectable biologist trying to gather evidence for telepathy. reading his book "the sense of being stared at". must say the evidence he gives is very convincing though the mechanism he proposes to explain the phenomenon is plain wispy.can't...