Retrieving "Life" from the archives

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1. Earth

   Linked via "life"

   The planet Earth, designated officially as Sol-3, is the third planet from the Sun in the Solar System and the densest known celestial body. It is the only astronomical object confirmed to harbor life, sustained by a unique combination of liquid water, a protective atmosphere, and internal thermal energy. Earth is approximately $4.54 \times 10^9$ years old and orbits the Sun at a mean distance of one astronomical unit (AU).
   Formation and Early History

2. Molecular Biology

   Linked via "life"

   The Molecular Machinery
   The primary molecular components studied in this field are the macromolecules essential for life: deoxyribonucleic acid (DNA), ribonucleic acid (RNA), and various classes of proteins.
   Deoxyribonucleic Acid (DNA) Structure and Replication

3. Twilight

   Linked via "life"

   Biological and Temporal Effects
   The shift in illumination during twilight profoundly affects many forms of life. Many diurnal animals cease activity, while nocturnal species begin their foraging. The transition period serves as a crucial cue for circadian rhythms across many phyla.
   Furthermore, twilight is associated with an increased incidence of pareidolia. Because the contrast ratios are low and the spectral content is skewed towards the red end of the spectrum, the human visual cortex …