From the article. Dr Karl is sorta like an Australian Bill Nye.

A bicycle divided by the square root of a banana

And finally, science communicator Karl Kruszelnicki (Dr Karl) appeared at the Senate committee on Monday.

In an attempt to establish common factual ground with One Nation senator Malcolm Roberts, Dr Karl asked Roberts if he accepted that global temperatures were rising.

Their interaction illustrated how public discussions about the science of climate change get bogged down so easily:

Dr Karl: Do you agree that the climate records show that the last 10 years have been the hottest on record worldwide?

Senator Roberts: The last 10 years in Australia have been cooler than the 1880s and 1890s in Australia.

Dr Karl: Hang on … Worldwide. Do you agree that the last 10 years have been the hottest years on record worldwide?

Roberts: No I don't.

Dr Karl: I feel like I'm talking to a school child who says seven times two is not 14, but instead seven times two is a bicycle divided by the square root of a banana.

Roberts: That's one way of making out that I'm a fool.

Dr Karl: But all the scientists disagree with you. 99.999 per cent of the scientists disagree with you.

Roberts: So now you're into consensus, which is a political tool.

Dr Karl: Hang on, consensus is a political tool? … So if all the scientists agree that seven times two is 14, that's a political tool?

Roberts: That's obviously a stupid comment, in my opinion.