Kids put their ears
close to the bark of Lemon-scented Gum (Eucalyptus citriodora)
and listen to the flow of water in the xylem of the tree. The game
is known as “heartbeat of trees”.
When the sun shines on the canopy, water is
pulled away from the leaves. Hydrostatic pressure is built up
inside the trunk and through to the roots. Roots then pull out
water from the soil for replenishment. This process of water
movement is called transpiration. As such, if we listen
attentively, we can hear the sound of the intermittent water flow.
Even though it does not work each and every time, it works once in a
When we hear the water flow, it is usually
thought that the tree is trembling. When the tree trembles, we
think that it’s because of wind blow. As long as you demand to get
to the bottom of things, you can always find the answer.
*translated by Mary Chung