Why do leaves change colour?

Like this? See all our tree videos at http://www.youtube.com/playlist?list=...

This video features Markus Eichhorn talking about why and how tree leaves change colour (color) in the Autumn (or Fall).

Test Tube by video journalist Brady Haran for the University of Nottingham.
More at http://www.test-tube.org.uk/

A run-down of Brady's channels:
http://periodicvideos.blogspot.co.uk/...

• Category

  Science & Technology

[mrericsully]

Grey & dreary in England- no way!

[TheEruditepolymath]

Markus Eichhorn IS AWESOME!!!!

more vids of him pls!!

[Dishmopo]

All throughout my childhood I was taught that the reason trees lose their leaves in autumn was due to the ground freezing, or not enough water, or something along those lines. Then, in October of 2011, I witnessed another (possibly more important) reason. We had about 8 inches of snow when the trees were still fully leaved. About 1 in 10 trees suffered significant damage as the buildup of snow was snapping limbs all over the place.

[TheThirdGerman]

In short: The tree is pulling Magnesium (core atom of Chlorophyll) our of the leaves, causing the Chlorophyll to break down and revealing the carotinoids.

[pigsnoutman]

Should be a BBC 4 program.

[Germanbiscuts]

@ nottinghamscience Could you do a video on the ginkgo tree?

[Edge0fPain]

I just got an offer to do Physics at Nottingham.

Feels good.

[Zandonus]

Wait, so youre telling me that maples don't shed their leaves in the UK?

[bigboam]

Great video! I love this guy! His explanations are clear, concise and enthusiastic. Hope to see many more....