Biomedical Engineering Reference
In-Depth Information
Figure 1.2
The 100-inch telescope used by Hubble at Mount Wilson.
Cosmological knowledge increased significantly over the course
of the 20th century. As well as Hubble's finding of the red shift
and its relation to the theory of the big bang, his pioneering work
in revealing a universe full of galaxies (Fig. 1.2) has eventually led
to the dynamics of galaxies being studied at the start of the 21st
century with respect to biological evolution on the earth. Galactic
dynamics turns out to be a key to understanding evolution and
biodiversity.Definitecyclesofaperiodof62millionyearshavebeen
discovered in the marine fossil record corresponding to the galactic
tides. Biological evolution has been put on a modern footing along
