A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


The Skeptics Handbook

Think it has been debunked? See here.

The Skeptics Handbook II

Climate Money Paper




The nerds have the numbers on precious metals investments on the ASX



There is a Greenhouse Effect on Venus

I‘m peppered with emails asking me if articles like this one (which claims there is no Greenhouse Effect at all on Venus) could be right.

Michael Hammer has some 20 patents in spectroscopy, and he explains why the Greenhouse Effect — where CO2 and other gases absorb and emit infra red — is very real, and backed by empirical evidence. The calculations using the Stefan-Boltzmann Law on the atmosphere of Earth and Venus, argue that the Greenhouse Effect is not-detectable. But not-detectable (by that method) does not “prove” the effect is zero. Other methods — like satellite observations of Earth’s atmosphere, and countless lab experiments, tell us that the Greenhouse Effect is real. (The Stefan-Boltzmann Law is used to create the first graph below). Huffman’s calculations suggest other factors are more important than greenhouse gases (with which we heartily agree) and that Hansen et al were barking up the wrong tree by pretending that Venus “shows” us anything much about the Greenhouse Effect. (Indeed, the IPCC mention “Venus” in their first Assessment Report back in 1990 as one of the three key reasons.)

So here in middle-of-the-road centrist land, the people who claim Earth could become more like Venus are [...]

DeSmog accidentally vindicates The Skeptics Handbook

DeSmogBlog could’ve flattened The Skeptics Handbook in just one sentence.

All they had to do was point to empirical evidence that more CO2 forces temperatures up. They can’t and everything else is bluster and bluff.

The question of evidence is on the front page; the book is built around it, and billions of dollars hinges upon it, on this topic, “nothing else matters…”. Yet Jeremy Jacquot’s sole attempt at evidence only shows he doesn’t know what evidence is. Even a bright junior high spark could prove him wrong with a 20 year old encyclopedia. Jacquot uses 3000 words to NOT answer that question, he confuses himself, resorts to cut-n-pasting from the site that does his thinking for him, and makes at least 9 errors of logic and reason. Jacquot complains that I’ve rehashed and repeated old arguments, which only makes it all the more embarrassing that he still hasn’t got any good answers.

But the part I like best was the way he jumps through the hoops just as I predicted. The Skeptics Handbook says when you poke a believer they will bark ‘Santer’, ‘Sherwood’, and ‘amplification’ and he does, right on cue. Yap Yap Yap. DeSmogBlog [...]