Question

1-How did life begin?
2-Are we alone in the universe?​

Answer 1

Answer:

don't know ?? but the universe is made of dust

Answer 2

Answer:

(1) Stromatolites — like these, found in the World Heritage Area of Shark Bay, Western Australia — may contain cyanobacteria, which were most likely earth's first photosynthetic organisms. Stromatolites have been found that date back to about 3.7 billion years ago.

(2) The earliest known life-forms are putative fossilized microorganisms, found in hydrothermal vent precipitates, that may have lived as early as 4.28 Gya (billion years ago), relatively soon after the oceans formed 4.41 Gya, and not long after the formation of the Earth 4.54 Gya.