Figure 1: Density-dependent colour scanning electron micrographs of samples of NHMUK R12562, an ungual claw of an indeterminate theropod dinosaur, and NHMUK R4493, ribs from an indeterminate dinosaur. | Nature Communications

Figure 1: Density-dependent colour scanning electron micrographs of samples of NHMUK R12562, an ungual claw of an indeterminate theropod dinosaur, and NHMUK R4493, ribs from an indeterminate dinosaur.

From: Fibres and cellular structures preserved in 75-million–year-old dinosaur specimens

Figure 1

(a) Amorphous carbon-rich material (red) surrounded by dense material (green). Scale bar, 5 μm. (b) Erythrocyte-like structures composed of carbon surrounded by cement. Scale bar, 1 μm. For comparison, fixed blood from an emu (Dromaius) is shown in Supplementary Fig. 2c, d. Fibrous structures. Scale bar, 5 μm in (c) and 1 μm in (d).

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