What is inside a cactus?

Many cactuses are covered in spikes - making them terrible to hug. But what about inside a cactus? Is it also spiky? Or is it soft and cuddly? And is it true you can find water hidden in these desert-dwellers?  We asked science communicator and plant expert Brandi Cannon-Force to help us find the answer.

Many cactuses are covered in spikes - making them terrible to hug. But what about inside a cactus? Is it also spiky? Or is it soft and cuddly? And is it true you can find water hidden in these desert-dwellers?  We asked science communicator and plant expert Brandi Cannon-Force to help us find the answer.

Got a question that’s stuck in your brain? Send it to us at BrainsOn.org/contact, and we’ll help pin down the answer.

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Smash Boom Best is a debate show for kids and families from the makers of the award-winning podcast, Brains On! Every episode takes two cool things, smashes them together and lets you decide which is best.


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Our mission is to encourage kids’ and curious adults’ natural curiosity and wonder using science and history…but there’s no age limit on curiosity, and episodes of Brains On can be enjoyed by anyone.


What is inside a cactus?

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