Wrong category if the "second Earth" you mean is the one a quick search found: nothing to do with speleology, but a planet orbiting a star called Gliese 581C about 20 light-years away in the constellation of Libra.
It is calculated to have a surface temperature similar to that of Earth, so amenable to life, but there the resemblance ends so far at least. The soubriquet appears to have been invented by the headline-writers of the British newspaper, The Guardian.
Johann Kepler.
Biodiversity ; Gradpoint .
Scientist describe energy as ability to do or perform work.
A geologist is a scientist that studies the Earth.
Earth is described as and oblate spheroid. It is mostly spherical but is slightly wider across the equator than across the poles.
Isaac Newton was the first british scientist to describe gravity.
No scientist found the Earth.
scientist that contribute in physical earth science
The second man to make a microscope was Antonie van Leeuwenhoek, a Dutch tradesman and scientist. He made significant advancements in microscope design and was the first to observe and describe microorganisms.
scientist were able to arrive at the distinct layer of the earth
Earth
Robert hooke