The Countdown to Maker Faire Bay Area is On!


What Happens When You Pour Molten Aluminum into a Watermelon?

Education Maker News Science
What Happens When You Pour Molten Aluminum into a Watermelon?
YouTube player

Over at The Backyard Scientist, they wanted to know what would happen if you poured molten aluminum into a watermelon. The results were surprising. And very cool.

I guess the aluminum flowed into the more watery, less dense cavities inside the melon where the water quickly cooled the metal before it could cook its way into the denser parts of the fruit.


Warning: This is, of course, potentially very dangerous. Just because their watermelon didn’t explode doesn’t mean that such a potential doesn’t exist. I would advise against actually attempting this. As my friend Kaden Harris says: “You cannot imagine the pain of a liquid metal burn.”

8 thoughts on “What Happens When You Pour Molten Aluminum into a Watermelon?

  1. anderson44 says:

    Every Time makezine with you
    ————— SEE MORE INFO<—– <<<<

  2. says:

    I’m shocked that it didn’t explode. When you add water to a vat of molten aluminum the intense heat can separate the hydrogen & oxygen bond of the water creating gases that explode. I guess in this case there was enough watermelon mass to cool the aluminum before that happened. Silly thing to do though, especially in tennis shoes.

    1. Bart G. says:

      You’re kidding, aren’t you? If not, you invented profitable hydrogen production method, congratulations!

      1. says:

        You are correct, skeptical stranger. I did a bit more looking into this and my understanding needed an update. Still though, mixing water & molten metal is very capable of causing explosions.

  3. John Daniels says:

    So the aluminum followed the natural cavities in the watermelon and made a cast. Imagine that. For some reason I didn’t expect it to explode. I would have been more surprised if it had.

  4. walsal123 says:


  5. david67 says:

    How To you get cash with makezine
    ————— SEE MORE INFO<—– <<<<

  6. Ryan Upton says:

    You have only done half the experiment. The really interesting stuff is now developing a mathematical formula that describes the distribution of the seeds. How are the seeds distributed and why are they distributed in that pattern? Are there efficiencies relating to seed distribution? Does the distribution relate to ant hill distribution.

Comments are closed.

Discuss this article with the rest of the community on our Discord server!

Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.

View more articles by Gareth Branwyn
Maker Faire Bay Area 2023 30% off early bird ticket sales ends August 31st, 2023!

Escape to an island of imagination + innovation as Maker Faire Bay Area returns for its 15th iteration!

Prices Increase in....