# Karl Kruszelnicki on Reddit (u/DrKarlKruszelnicki)

Part of Scientists on Reddit, researched with Autumn (https://www.autumn.ai) from public sources. Updated 2026-11-07. Interactive version: https://www.autumn.ai/resources/scientists-on-reddit/karl-kruszelnicki

Karl Kruszelnicki: Australian science communicator, physicist and doctor.

- Reddit account: [u/DrKarlKruszelnicki](https://www.reddit.com/user/DrKarlKruszelnicki/) (AMA only)
- How we know it's theirs: [The 2013 r/IAmA AMA, posted from this account](https://www.reddit.com/r/IAmA/comments/1qxh6p/)
- Where they post, in the records we retrieved: r/IAmA (81)
- Known activity in the posts we found: 2013 to 2013
- Wikipedia: https://en.wikipedia.org/wiki/Dr._Karl

## Moments

### u/DrKarlKruszelnicki in r/IAmA, Nov 19, 2013 · Personal story

Replying to a redditor:

> Does it ever irritate you to have people call up asking the same question time after time? What is your most disliked question you regularly receive? You're a hero, someone to aspire to be like, and I'm an immense fan :-)

> > Does it ever irritate you to have people call up asking the same question time after time?
>
> Never. One thing I learnt being a roadie for Bo Diddley, after hearing him sing the same songs, night after night. For the audience, it's their first time.

Full thread: https://www.reddit.com/r/IAmA/comments/1qxh6p/comment/cdhmfv9/ · 83 points as of Nov 7, 2026

### u/DrKarlKruszelnicki in r/IAmA, Nov 19, 2013 · Explains things

Replying to a redditor:

> Hey Dr Karl! What is the most astounding fact you can tell us about the universe/life in general?

> > What is the most astounding fact you can tell us about the universe/life in general?
>
> 1)all the gold you will ever touch was made inside an exploding star
> 2)Kilogram for kilogram, your compost pile generates 33,000 times more power than our Sun

Full thread: https://www.reddit.com/r/IAmA/comments/1qxh6p/comment/cdhjv7z/ · 398 points as of Nov 7, 2026

### u/DrKarlKruszelnicki in r/IAmA, Nov 19, 2013 · Personal story

Replying to a redditor:

> Dr Karl, What is your opinion on the current educational apparatus as relevant to todays needs, especially with respect to the research of people such as Sir Ken Robinson. Do we need an educational seachange, or do you think that the current system is adequate.

> Education. When I was in Bangkok Airport checking in a group of schoolkids (I was not the teacher, but she was in hospital, so I took over), the person behind the counter asked if I was a teacher. I said "yes" because it was too complicated to explain full story. She then upgraded me to Business Class.
> Only when we all treat ALL teachers (childcare to University) with that kind of respect, will the Education System be unbroken.

Full thread: https://www.reddit.com/r/IAmA/comments/1qxh6p/comment/cdhjqtu/ · 272 points as of Nov 7, 2026

### u/DrKarlKruszelnicki in r/IAmA, Nov 19, 2013 · Personal story

Replying to a redditor:

> what was your strangest experience as a taxi driver?

> Strangest experience as a taxi driver? Getting lost in the huge Yagoona Tip(garbage dump) at 0200, with no stars to navigate out by, and out of radio range. I had to wait for dawn.

Full thread: https://www.reddit.com/r/IAmA/comments/1qxh6p/comment/cdhjm15/ · 275 points as of Nov 7, 2026