The Heart Beats on the Left By jeltsch on Fri, 09/15/2017 - 22:19 The heart points to the left and most people's heart is about one-third right, two-thirds left. Language English
Chicken embryo By jeltsch on Tue, 08/18/2009 - 09:55 Through a hole in the egg shell you can visually follow the complete chicken development. Language English