Science Chats Forum

Well, the extinction of dinosaurs still remains only a theory; nothing concretely proved. But in my lifetime, I have seen the Tsunami destroying huge portions of my native city, and I would rate it one of the worst.

I guess it depends on your criteria for "worst"... if we're talking in terms of the most violent, with the most energy released, it would probably be the asteroid that killed off the dinosaurs. If we're talking about greatest number of people killed in recorded history, then I'd guess it was probably the tsunami. (If there were any other natural disasters that caused even more loss of life, I don't know about them.) Insurance companies would probably think in terms of property damage and have a different idea about what constitutes the worst disaster they've seen so far.

Xoox, sorry the tsunami devastated your native city; I hope your loved ones made it to safety and can rebuild.

The asteroid that hist the dinosaurs was definitely the most devastating.....

If you're asking about the greatest to hit humans I would have to say the tsunami.

Yesterday, I just learned that an earthquake on June 7, 1692, largely destroyed Port Royal, the centre of shipping commerce in Jamaica in the 17th century, causing two thirds of the city to sink into the Caribbean Sea such that today it is covered by a minimum of 25 ft (8 m) of water. Not the greatest natural disaster, but quite a disaster ...

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Actually even if the sun was covered plants would continue drawing in some CO2. Even when the sun got covered it was not pitch black some light did get through.

I think the greatest disaster to ever hit humans was when Lake Toba erupted.

While I am on the subject of volcanos I would also like to state that Yellowstone is actually about 50,000 years overdue for an eruption. And when that thing blows you better hope you not in the U.S. or else your as good as dead.

Also about the dinosaurs becoming extinct there is some evidence that a volcano may have caused the extinction.

And one more thing contrary to popular beleif not ALL dinosaurs were killed after the asteroid or whatever happened occured. Avian dinosaurs survived. There have also been some Nonavian fossils found above the K-T boundary.

I feel that dinosaurs were killed by a methane eruption. Methane dissipates eventually and the evidence would pretty much be gone. No one has shown a asteroid or some un earthly rock that hit that long ago. I'm really fond of the methane theory. That methane eruption happened world wide killing most dinosaurs and land animals. (why is it that crocs and air born dinosaurs were proved to live longer and not die out at same time?) Water living creatures wouldn't have been effected thus the ocean life seemed to remain alive.

So my answer is a methane eruption that wiped out the dinosaurs.

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Well the greatest natural disaster is yet to come. Theoretically the oil is the blood of our living planet, it power to core that sustain a magnet relation with the sun. When and if the core should die the earth would either freeze over are we pull closer to the sun:eek:

But of the one's that have happened, what would you say was the worst?

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The K-T Event(Cretaceous–Tertiary extinction event) pales in comparison to the Permian Mass Extinction. More has been published about the extinction of dinosaurs at the K-T boundary than any other group of organisms, which is why it is so widely known.

The Permian–Triassic extinction event, sometimes informally called the Great Dying, was an extinction event that occurred 251.4 million years ago. It was the Earth's most severe extinction event, with up to 96% of all marine species and 70% of terrestrial vertebrate species becoming extinct. It caused the extinction of such invertebrates as trilobites, Blastoids, and eurypterids. There is enough evidence to indicate that over two-thirds of terrestrial amphibian, sauropsid ("reptile") and therapsid ("mammal-like reptile") families became extinct. All Permian anapsid reptiles died out except the procolophonids (testudines have anapsid skulls but are most often thought to have evolved later, from diapsid ancestors). Pelycosaurs died out before the end of the Permian. As far as how this great extinction occured is still debated.

As far as how the dinosaurs went extinct, there is enough clear evidence to convince me that it was caused by the Chicxulub Crater impact.

The tsunami in SE Asia and Hurricane Katrina in the Gulf Coast, stick out in my mind.

That's my two cents.:D