Erdähnliche Planeten, die Rote Zwerge umkreisen, verfügen möglicherweise nicht über das richtige Licht, um mehrzellige Organismen zu unterstützen

The article claims that:

>Photosynthesis requires a specific kind of light known as

>Photosynthetically Active Radiation (PAR). This is the specific range of

>sunlight (400 to 700 nanometers) that plants, algae and cyanobacteria

>need to thrive. Although it was known that light from M-dwarf stars like

>TRAPPIST-1 is mostly infrared, which falls outside this range, what was

>unknown was how this would slow down the evolutionary clock.

But there are problems with that. For a start, on Earth, there is Far-Red Light Photoacclimation.

There are also biological ways of adding the energy of two photons together. On Earth, using p680 and p700 complexes together allows for reactions that need around 1.5 times the energy of a red photon. Lower energy photons can also be used in photoheterotrophs system to just make ATP via the proton gradient.

Maybe low-energy photons could drive proton gradient for ATP-analogue synthesis, and rare high-energy photons could be used for carbon fixing/oxygen extraction. With proton gradient and multiple protons per ATP, you could use really low photon energies, down to the thermodynamic floor.

EARTH-LIKE life maybe. I get we have exactly one study group to work from, but jesus fucking christ…..