There are many examples of major events that have shaped the history of life on earth
The decline in the dinosaurs and rise of the mammals has been the subject of intense scientific study.
The Earth receives it’s energy from the Sun in the form of sun light.
Our atmosphere is transparent to visible light (ie light gets through). This is because sunlight is “high energy” and high frequency (short wavelength).
Some 50% of the sun’s energy reaches the Earth’s surface.
