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existed on another planet and moved to Earth by meteorites, comets etc. Currently, this
theory can not be proven. Additionally, it simply transports the question somewhere
else. -
This theory states that the first living organisms that appeared on Earth arose
from inorganic matter in a time when the chemical environment and conditions of the
planet were very different from today’s conditions. In this idea, pre-biological
changes slowly transformed simple atoms and molecules into the more complex
chemicals needed to produce life. -
The theory of spontaneous generation was believed for centuries, since at least
the time of Aristotle (4th Century BC, classical Greek philosopher). People, including
scientists, believed that higher living organisms, including man, had a divine origin;
however, simple living organisms could come into being by spontaneous generation. -
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darwin and wallace
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.