Where did he get a 40,000 year old tree?
OK. So they are trying to explain away warmth in the past when only cars and cow farts cause warming. Science you know.
A fun question that most don’t even think about: If every point in the entire sky contains, at some distance, a star who’s light energy is reaching earth, why is the sky not lit up like daylight even at night? There is an answer, but most people don’t even ask the question.
A supernova within about 150 light years from Earth would severely impact the planet. For that matter a gamma ray burst thousands of light years away would to the same if aimed at Earth. And we thought that asteroids were all we had to worry about. Lol.
"Far-Off Supernovas Caused Climate Change on Earth"
Our climate has always changed. It's never been static.
Time to send out a petition to Dem voters stating we need to dedicate our resources to stop all Supernovas
SuspiciousObservers.org gives a daily six minute presentation of space weather predictions and how it affects our planet.
Warning, big words:)
A distant star can change our climate, but the closest one has no effect on our climate?
Got it.
Does the actions of a butterfly on another planet lead to a chain of events that cause climate change on earth? (from the “science” that says everything affects everything in some way).
Our sun can have corona storms that resemble novas, some call micro novas. These are a bigger threat.
This books makes a very good case for solar system & galactic radiation events effective climate.
Humans had nothing to do with it!
No! No! It’s capitalism that causes climate change.
So does that mean that it’s not settled science?
Michael G. L. Baillie is Professor Emeritus of Palaeoecology at Queen's University of Belfast, in Northern Ireland. Baillie is a leading expert in dendrochronology, or dating by means of tree-rings. In the 1980s, he was instrumental in building a year-by-year chronology of tree-ring growth reaching 7,400 years into the past.
Upon examining the tree-ring record, Baillie noticed indications of severe environmental downturns around 2354 BC, 1628 BC, 1159 BC, 208 BC, and AD 540. The evidence suggests that these environmental downturns were wide-ranging catastrophic events; the AD 540 event in particular is attested in tree-ring chronologies from Siberia through Europe and North and South America
Whether warming is caused by supernovae or sunspot activity, it's evident we go through phases of warming and cooling.
The Medieval Warming Period occurred for a few centuries, crops yielded more, people flourished, sea levels rose, all of that is fact.
Then there was a cooling period over centuries sometimes referred to as The Little Ice Age. Crops yielded less, there were famines, sea levels receded (the ancient city Ephesus of the New Testament used to be a port city, now it's a few miles from the sea), all of that is fact.
Absolutely nobody should be surprised at the warming that's occurred for the past two centuries as we've come out of the Little Ice Age and begin another warming period. In fact, we should embrace it.
Correction: “man-made supernovas, and the only answer is less freedom”
One little nitpick on this article. Carbon-12 is not turned into Carbon-14. There is no neutron capture involved. Nitrogen-14, the most common isotope, is turned into Carbon-14, which in turn beta decays back to Nitrogen-14.
I wonder just how many copies of the “International Journal of Astrobiology” gets mailed each month or is it just an on-line subscription now.