On 7月22日, 下午11時08分, Wretch Fossil <wretchfos...@gmail.com> wrote:

A white fat cell fossil (Fig. 1), over 200 microns across- twice the
standard size of human fat cells, is found in meteorite NWA 5000. Fig.
1:http://www.wretch.cc/album/show.php?i=lin440315&b=29&f=1782718851&p=25

Image source and credit for Fig. 1:http://www.meteorite.com/meteorite-gallery/meteorites-alpha_frame.htm
(Sourcing path: Select NWA 5000 article in the above URL, then scroll
down the right portion to the third photo)

Fig. 2: Terrestrial fat cells, labeledhttp://www.wretch.cc/album/show.php?i=lin440315&b=28&f=1177279911&p=228
Image source and credit for Fig. 2:http://www.anatomyatlases.org/MicroscopicAnatomy/Section03/Plate0340....

Fig. 3: SEM of human white fat cells for comparisonhttp://www.visualsunlimited.com/image/I000007cTx6E7q.E

Added on July 23, 2011:
Why they were fat cells rather than geologic vesicles.

The following micrographs show the reasons:

Fig. 1: shows lipid droplet in the act of seeping out of a non-
circular fat cell
http://www.wretch.cc/album/show.php?i=lin440315&b=29&f=1782724831&p=26

Fig. 2: shows nucleus of a fat cell
http://www.wretch.cc/album/show.php?i=lin440315&b=29&f=1782724832&p=27

Image source and credit for Fig.1 and Fig.2:
http://www.meteorite.com/meteorite-gallery/meteorites-alpha_frame.htm

(Sourcing path: Select NWA 5000 article from the above URL and then
scroll down the right portion to the second and the fifth photos)