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  2. List of light sources - Wikipedia

    en.wikipedia.org/wiki/List_of_light_sources

    This is a list of sources of light, the visible part of the electromagnetic spectrum.Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the moon, cat's eyes, and mirrors) do not actually produce the light that ...

  3. Life That Glows - Wikipedia

    en.wikipedia.org/wiki/Life_That_Glows

    Life That Glows (also known as David Attenborough's Light on Earth) is a 2016 British nature documentary programme made for BBC Television, first shown in the UK on BBC Two on 9 May 2016. The programme is presented and narrated by Sir David Attenborough .

  4. Light - Wikipedia

    en.wikipedia.org/wiki/Light

    The main source of natural light on Earth is the Sun. Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps. With the development of electric lights and power systems, electric lighting has effectively replaced firelight.

  5. Purple Earth hypothesis - Wikipedia

    en.wikipedia.org/wiki/Purple_Earth_hypothesis

    The Purple Earth Hypothesis (PEH) is an astrobiological hypothesis, first proposed by molecular biologist Shiladitya DasSarma in 2007, [1] that the earliest photosynthetic life forms of Early Earth were based on the simpler molecule retinal rather than the more complex porphyrin-based chlorophyll, making the surface biosphere appear purplish ...

  6. Aurora - Wikipedia

    en.wikipedia.org/wiki/Aurora

    An aurora [a] (pl. aurorae or auroras), [b] also commonly known as the northern lights (aurora borealis) or southern lights (aurora australis), [c] is a natural light display in Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras display dynamic patterns of brilliant lights that appear as curtains ...

  7. The Nature Photographer Of The Year: 30 Captivating Images ...

    www.aol.com/meet-winners-57-impressive-photos...

    The winners of the Nature Photographer of the Year (NPOTY) 2024 competition have been announced! This prestigious event celebrates the very best in nature photography, showcasing stunning work ...

  8. Sun - Wikipedia

    en.wikipedia.org/wiki/Sun

    Sunlight on the surface of Earth is attenuated by Earth's atmosphere, so that less power arrives at the surface (closer to 1,000 W/m 2) in clear conditions when the Sun is near the zenith. [100] Sunlight at the top of Earth's atmosphere is composed (by total energy) of about 50% infrared light, 40% visible light, and 10% ultraviolet light. [101]

  9. Fruit fly brain map ‘could help shed light on how humans ...

    www.aol.com/fruit-fly-brain-map-could-200522064.html

    The map shows how the brain’s 140,000 neurons make close to 50 million connections between them. Fruit fly brain map ‘could help shed light on how humans think and behave’ Skip to main content