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Should you really be weeing on your lemon tree? How close are we to finding proof of life on Mars? And what would happen to a helium balloon in zero gravity?
Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.
By triplej, triple j4.8
139139 ratings
Should you really be weeing on your lemon tree? How close are we to finding proof of life on Mars? And what would happen to a helium balloon in zero gravity?
Dr Karl answers these questions and more on triple j Mornings with Lucy Smith.

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