MAN FROM THE FARTHEST PAST 
The same is true of human remains, though in far less 
degree; for man even then was able to afford himself and 
his kind protection from the frightful snowstorms. 
Other phenomena attending the Glacial Period were 
- the recurrent elevation and sinking of the land. We do 
not know definitely just what occasioned this, but the 
very weight of the enormous ice sheets seems to have 
caused the ground beneath them to sink slowly, while 
the regions where they were absent were pressed as 
gradually upward, in a sort of slow seesawing motion. 
Still another contributory cause seems to have been 
the actual lowering of sea level during the glacial stages. 
In order to form the enormous ice fields, water had to 
come from some source. Normally that drawn up out 
of the ocean by evaporation is returned to it, either di- 
rectly as rain and snow falling on its surface, or indirectly 
through rivers, streams, and melting icebergs. But dur- 
ing the recurring glacial epochs this balance was upset. 
Then the snow which fell over vast areas, instead of 
melting the following summer to flow eventually back 
into the ocean, slowly, year after year, turned into ice. 
While the glaciers were thus growing in size during tens 
of thousands of years, more water was being withdrawn 
from the ocean than was going back into it. Dr. Ernst 
Antevs, of the University of Stockholm, a very high 
authority, has made some interesting calculations based 
upon this fact. He says: 
The volume of ice during the climax of the last glaciation in excess of 
the existing quantity, according to the estimates made in the foregoing 
chapter, was as follows: 
Cubic 
Kilometers 
of Ice 
North Amenicanviee sheer rn Or OO ae, es 27,050,000 
Européan ice Sheets iyo. au och ist (oe) tien Sn eis See 5,000,000 
Other. Pleistocene. glaciersiin Eurasia} jt: oie bce e pith 350,000 
Greenlandiciice sheet ob m5. (Sao. "s aoe, gabe eae 400,000 
Northern: Hemispheres. ish cebu: Sih. SSRIs ee 32,800,000 
