Why do we sometimes cry when we're happy? Can trees live forever? How do reflections actually work? 

Dr Karl answers these questions and more, on triple j mornings with Lucy Smith.

Happy tears, immortal trees, reflections

Join Dr Karl Kruszelnicki, Lucy Smith and their scientific guests, with a bunch of curious triple j listeners for a weekly injection of science, myth-bashing and answers!

Science

What impact does trauma have on your memory? Why do chillies burn your tongue and lips but not your throat? And could octopuses take over the world? 

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Flushing etiquette, growing pains and heat vs temperature

Why do some medications reduce your sex drive? Why do dogs bite their own tail? And if you were preparing for the end of the world, what is the one medication you would take with you?

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Cloning dinosaurs, inbreeding implications and the soft cheese crisis

What is it about beans that make us fart? Why do we lose muscle so quickly? How does a drink's temperature impact its fizz?

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Tea wees, volcanic extinction and muscle loss

Why do old people have such a distinctive smell? What would happen if gravity suddenly doubled? And why do my limbs always swell during a flight?

Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

Violent burps, sneezing erections and breathing bums

Is it possible to speed up or slow down the speed of sound? Will stars eventually become invisible to the naked eye? And what would happen if you took your space suit off in space?

Dr Karl and special guest, Dr Laura Driessen, answers these questions and more on triple j Mornings with Lucy Smith.

Happy tears, immortal trees, reflections

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