[Flick Lives]

Branches of birch trees have now been seen drooping by as much as 10 centimetres at the tips towards the end of the night.

I wonder if these scientists considered this might just be the effect sunlight / heat has on lumber. Heat a board to bend it by shrinking the cells in the wood.

[going hot]

Water drawing up through the roots and evaporating at the leaves, higher pressure, more rigid cells.

At night, no draw, pressure goes down, causes moderate deflation of the cells, they droop some.

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