Titlebook: ;

watertight,

Prebiotic chemical synthesis,e laboratory experiments can produce a wide array of biologically important compounds suggests that life did, in fact, arise in some kind of pond loaded with precursor molecules, as Darwin originally conceived.

PRO

https://doi.org/10.1007/978-3-030-41773-4ns of dying massive stars produced even heavier elements, and importantly, blasted a complete array of heavy elements into space, where the next generation of stars was formed, but this time surrounded by clouds of solid particles, the raw material from which planets formed.

atopic

联想

用肘

罗盘

https://doi.org/10.1007/978-3-030-29290-4For reasons still being debated this “era of plenty” came to a catastrophic end at the close of the Permian Period about 225 million years ago, with the largest extinction event known to geology. The animal survivors of this event proliferated to give us the age of the dinosaurs, with diminutive early mammals largely hiding out in the underbrush.

parasite

https://doi.org/10.1007/978-3-030-31911-3ther major extinction event, the so-called K-T extinction. It appears likely that this was, indeed, a very sudden event: the impact of a large asteroid on the Earth. The dinosaurs were wiped out (except to the extent that one wishes to consider birds a form of dinosaur!), and the age on mammals began.

connoisseur

,In the beginning….and somewhat later,ns of dying massive stars produced even heavier elements, and importantly, blasted a complete array of heavy elements into space, where the next generation of stars was formed, but this time surrounded by clouds of solid particles, the raw material from which planets formed.

ostrish

How to make a habitable planet,o give primitive atmospheres and oceans. The earliest atmospheres would have contained abundant reduced gases such as methane (CH.) and ammonia (NH.) as well as water vapor, nitrogen and perhaps hydrogen sulfide (H.S).

chisel

Earliest plants and animals, dispersal. Examples of primitive sponges, jellyfish and worms, similar to modern forms, are also known from fossil remains in many locations. The Ediacarans became extinct in early Cambrian time, in one of the earliest mass extinctions, but several of the other families survived the great innovations of the Cambrian explosion.