Lets look into how was this earth formed?
In science we must expand our
conception of reality all the time. One of the very difficult concepts is the understanding of time. Everyone is conscious of the changes in the physical and biological world; they give us an awareness of time. The daily rhythm, the seasons, physical changes throughout a
human lifetime are familiar concepts of time to us. Time is measured by change, but where change occurs over millions of years our own perception of time is on unfamiliar territory. To understand the rhythm of
change of our planet and the effects it has on life on Earth we have to expand our perception of time.
The geological processes that shape the surface of our planet, move the tectonic plates, build mountains and erode them again work over millions of years. These forces provide the ever changing conditions for life, which adapted to those changes. But those changes did not go undetected. Our understanding of Earth has expanded tremendously in the past 100 years, and new technologies have provided further insight into Earth's dynamic and history.
Earth itself acts like a clock,
rotating on its axis once every 24 hours. To read Earth's time it is necessary to look at the changes that have been recorded. To identify changes that occurred due to the geological processes of our planet we can look at rocks. They are key to both the past and the nature of processes.
Life has managed to leave records of time and the changes it went through time as well.
Fossils are the remains of ancient organisms. Some looked very similar to life forms that are still living today. Fossils can be bones, teeth, shells, impressions of plants and even imprints of animal tracks. Fossils within a rock are a type of organic clock that tick by systematic radioactive decay of certain chemical elements, which permit us to measure with remarkable accuracy the number of years that have passed since the minerals in a rock crystallized.
Fossils are recorded in rocks much like your
footprints are recorded on a beach. As you walk along the beach, if the sand is fine enough and soft enough, you will make footprints. If the wind and waves do not destroy your footprints, they may record your existence well after your passing.
On july 22 wednesday morning the total solar eclipse of this century is going to occur. This infact is the longest duration solar eclipse of this century. This eclipse is of special interest for the scientists and general public as its path of totality passes through thickly populated regions of west, central, east and north-east India.The maximum duration of totality of 6 minutes 44 seconds occurs at 8:05 a.m. in the North Pacific Ocean where the width of the path is about 258 km. The 'rest of the path does not pass through major land areas.
Lets look into how was this earth formed?
