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Last summer Greg met Lucy, now in her 20s, for the first time.
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This was Collins's last flight. She tells us that she always planned to stop after her fourth mission - to give others a chance to go to space.
The change to agar was a marked improvement. The jelly is so effective that it is still an invariable ingredient in what is known today as the “Koch’s plating technique” or the “culture plating method.” As Koch himself noted in 1909: “These new methods proved so helpful…that one could regard them as the keys for the further investigation of microorganisms…Discoveries fell into our laps like ripe fruits.”