CRISPR and dewar flask: what they have in common

1. Step 1. CRISPR — evolved from — Recombinant DNA. Precise editing.
2. Step 2. Recombinant DNA — uses — DNA double helix. Working with DNA.
3. Step 3. DNA double helix — uses — X-ray crystallography. Rosalind Franklin’s Photo 51.
4. Step 4. X-ray crystallography — uses — X-rays. X-ray diffraction.
5. Step 5. X-rays — uses — Vacuum. Röntgen discovered the rays while experimenting with a discharge in an evacuated Crookes tube.
6. Step 6. Vacuum — is used in — Dewar flask. A vacuum.

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