Life itself is dependent upon the specialized chemistry of carbon and water and is largely based upon five different families of chemicals.
Lipids are fatty molecules comprising large chemical chains of hydrocarbons and play an important role in the structure of living cell membranes, actively and passively determining the transport of other molecules into and out of cells.
Background We think of a battery today as a source of portable power, but it is no exaggeration to say that the battery is one of the most important inventions in the history of mankind.
"Either you do the work or you get the credit" Yakov Zel'dovich - Russian Astrophysicist Fortunately it is not always true.
My 8-year-old son is very worried about Earth being destroyed by the sun when it becomes a red giant billions of years from now. They are deciduous and their leaves turn bronze in the autumn, but they don't fall off the tree.
I have tried to comfort him by suggesting we could shift Earth's orbit by hurling asteroids towards the planet on trajectories that will gradually move it away from the sun. Instead, they hang on until spring when other plants are putting out their new leaves.
The earliest known life forms on Earth are putative fossilized microorganisms, found in hydrothermal vent precipitates, that may have lived as early as 4.28 billion years ago, not long after the oceans formed 4.41 billion years ago, and not long after the formation of the Earth 4.54 billion years ago.
Abiogenesis is studied through a combination of paleontology, laboratory experiments and extrapolation from the characteristics of modern organisms, and aims to determine how pre-life chemical reactions gave rise to life on Earth.