Hosted by Sandra Tsing Loh, The Loh Down on Science is a fun way to get your daily dose of science plus a dash of humor in less than two minutes.
Hosted by Sandra Tsing Loh
Airs Weekdays 2:43 and 3:43 a.m.

Photo Finish




L: National Gallery of Canada, R: Madalena Kozachuk

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Picture the past… If you can!  But can you?

This is Sandra Tsing Loh with the Loh Down on Science.

The first photographs were daguerreotypes.  They were developed using mercury and gold instead of silver, which came later. These pieces of history are tarnished and may be lost forever!  Or… are they?

Madalena Kozachuk and colleagues embarked on a quest to restore the past. How? The team used X-rays to map where the metal deposits were, using a particle accelerator!

This device shoots out high speed electrons or protons. They found that as the amount of chemicals deposited changed, different parts of the image were lighter or darker.  This allowed them to develop outlines of the people and their clothing. Using a little chemistry, they filled in between the lines like a coloring book

The portraits were restored good as new and looked freshly taken. Amazing!

The team hopes that museums can use this technology to restore other pieces of history.

I guess this means we can turn Flashback Friday into FUTURE Friday!