Human embryo development

A time-lapse simulation of human embryo development from days 24 to 56, based on optical photographs of human embryos. Notice the protruding tail, which disappears as the embryo grows.

Video source: Brad Smith, University of Michigan / YouTube.

Quirks of evolution

New banknotes: design & production

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Video: New banknotes: design & production

Next generation of Australian banknotes: new $5

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Video: Next generation of Australian banknotes: new $5

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Video: Australian banknote production