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What is Life?

Delve into the intriguing questions of life's beginnings, exploring theories on Earth's formation and the potential for life on Mars. Discover the unity and diversity of life as explained by evolution, and ponder the possibility of life beyond our planet. Examine the characteristics that define living organisms and the fascinating process of abiogenesis. Could there be other life forms existent and how would we recognize them? Explore the wonders of synthetic organisms and ponder the intriguing concept of computers evolving into living beings. Join the quest to understand the origins of life in this captivating journey through biology.

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What is Life?

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  1. What is Life? Introduction to Modern Biology I. Péter Molnár, Zoology, Univ. West Hungary, Szombathely Mader: Inquiry into Life Silbernagi: Color atlas of Physiology

  2. How to define life? • Could Other life-forms exist? Could we recognize it? • How life developed on Earth? – Arrived from space, developed on other planets? • Can we make life? Living organisms? Humans? • Will computers / softwares ever evolve into living things?

  3. The first synthetic cellD G Gibson et al, Science, 2010, DOI: 10.1126/science.1190719

  4. A semi-synthetic organism with an expanded genetic alphabet D. A. Malyshev et al. Nature 509, 385–388 (15 May 2014)

  5. Living Things Are Organized • Acquire Materials and Energy • Homeostatic • Respond to Stimuli • Reproduce • Things Grow and Develop • Adapted Evolution, which has been going on since the origin of life, explains both the unity and the diversity of life. All organisms share the same characteristics of life because their ancestry can be traced to the first cell or cells. Organisms are diverse because they are adapted to different ways of life. Are computers alive?

  6. https://www.youtube.com/watch?v=3w1fY67dnFI Biology Lecture - 1 - Introduction to Biology https://www.youtube.com/watch?v=zcHBT6QFIqk Biology Lecture - 2 - What is Life? https://www.youtube.com/watch?v=1tWuDkrvJ6k Biology Lecture - 3 - Properties of Life http://www.ted.com/talks/martin_hanczyc_the_line_between_life_and_not_life http://thesciencenetwork.org/programs/the-great-debate-what-is-life/what-is-life-panel

  7. Origin of life http://en.wikipedia.org/wiki/Abiogenesis https://www.youtube.com/watch?v=W3ceg--uQKM Abiogenesis http://www.powershow.com/view/3d0c7-NWY1N/How_To_Study_The_Origin_of_Life_On_Earth_powerpoint_ppt_presentation

  8. Where life come from? https://www.youtube.com/watch?v=ofFhHcvasHA The general consensus now is that the original rock formed 4 billion years ago on Mars. It was eventually catapulted into space by an impact and wandered the solar system for millions of years before landing on Earth 13,000 years ago. Over 50 other meteorites have been identified as coming from Mars, but ALH84001 is by far the oldest, with the next in age being just 1.3 billion years old. This high-resolution scanning electron microscope image shows an unusual tube-like structure that is less than 1/100th the width of a human hair in size found in meteorite ALH84001. Credit: NASA http://www.astrobio.net/news-exclusive/the-continuing-controversy-of-the-mars-meteorite/

  9. Professor Steven Benner, a geochemist, has argued that the "seeds" of life probably arrived on Earth in meteorites blasted off Mars by impacts or volcanic eruptions. As evidence, he points to the oxidised mineral form of the element molybdenum, thought to be a catalyst that helped organic molecules develop into the first living structures. Homework: Collect data on extreme life forms, which could survive space travel

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