The oceans are also becoming more acidic. An article in Scientific American (Doney, S. 2006. The Dangers of Ocean Acidification. Scientific American. 294(3):58-65) brings to light a hypothesis where global trends in hydrogen sulphide and carbon dioxide was partly responsible for the mass extinctions at the end of the Permian period. Also, organisms that rely on calcium carbonate and aragonite for their shells will be at risk as calcium carbonate and aragonite dissociate in acidic environments. An interesting read for any who are interested in the subject.
At my school (post secondary) if you forget your password you have to go down to the IT department and have them reset it. Most of the time they just give you a generic "1234" password. But the system requires that you change your password after three logins if you are still using the temporary password.
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The oceans are also becoming more acidic. An article in Scientific American (Doney, S. 2006. The Dangers of Ocean Acidification. Scientific American. 294(3):58-65) brings to light a hypothesis where global trends in hydrogen sulphide and carbon dioxide was partly responsible for the mass extinctions at the end of the Permian period. Also, organisms that rely on calcium carbonate and aragonite for their shells will be at risk as calcium carbonate and aragonite dissociate in acidic environments. An interesting read for any who are interested in the subject.
Agreed. From the summary, "snowballearth.org suggests the meltdown could have occurred in as little as 2,000 years."
At my school (post secondary) if you forget your password you have to go down to the IT department and have them reset it. Most of the time they just give you a generic "1234" password. But the system requires that you change your password after three logins if you are still using the temporary password.