[回報] 7/30台大AWA

[ler999 (樂)]

Issue
"We can ususally learn much more from people whose views we share than
from people whose views contradict our own; disagreement can cause stress
and inhibit learning."

Argument
"Scientists studying historical weather patterns have discovered that in the
mid-sixth century, Earth suddenly became significantly cooler.  Although few
historical records survive from that time, some accounts found both in Asia
and Europe mention a dimming of the sun and extremely cold temperatures.
Either a huge volcanic eruption or a large meteorite colliding with Earth
could have created a large dust could throughout Earth's atmosphere that
would have been capable of blocking enough sunlight to lower global
temperatures significantly.  A large metorite collision, however, would
probably create a sudden bright flash of light, and no extant historical
records of the time mention such a flash.  Some surviving Asian historical
records of the time, however, mention a loud boom that would be consistent
with a volcanic eruption.  Therefore, the cooling was probably caused by a
volcanic eruption.



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