The initial "push" upward by the cold front on that balloon filled with surface air is like a child letting a helium-filled balloon go -- it just keeps rising.

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The researchers believe that as the cold wave moves from the surface, the rock pore space is completely filled in.

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Then they move the plants to a darker environment to encourage flowering and the formation on the surface of its buds, leaves and stems of trichomes, tiny resin-filled glands resembling sea anemone.

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