Showing posts from August, 2015

How The Ice Age gave birth to Human Civilization

Everyone knows of annual variations that take place as the Earth orbits around the Sun. However there are other much longer duration variations that also take place. As the Earth spins around its axis and orbits around the Sun, several other periodic variations occur. Milankovitch, a Russian Scientist, studied some of these changes in Earth's movements and described what are known as Milkanovitch Cycles. Such changes in movement and orientation alter the amount and location of solar radiation reaching the Earth and are a cause of various ice ages and variations within the ice ages that the planet has witnessed in the past. There are other factors that also contribute to the occurrence of such major climatic changes.
There have been at least five ice ages in the past and presently we live in a relatively warm portion of an ice age that is currently on. That is why the polar ice sheets still exist. Some say that this will end after 50,000 years while a recent research study says i…

New Evidence form Rosetta Mission Supports Pansemeria Hypothesis

How life came to Earth
Some of the earliest posts of this blog dating back to 2006 suggested that seeds of life were brought to earth by comets. The theory can be reached quickly by clicking archive links in the side bar. The theory named Pansmeria, an adaptation and detailing of the Panspermia hypothesis, then went on to develop a model of how life emerged on Earth and how it may emerge similarly on other habitable planets of the universe where temperature is in the range to permit presence of liquid water, sunshine conducive for photosynthesis and gravity sufficient for holding an atmosphere. Some of the precise details of the theory may need slight revision but this blogger stands by the overall picture as originally presented. Every new evidence that has emerged from science since has supported it.
Now new evidence from the Rosetta mission support the founding principle of the hypothesis of eight years ago, that comets can bring life to Earth. See this report from CNN,