biology - Ability to harden skin at will

Already exists Echinoderm skin already does everything you want. Starfish are your best match, they have both fast hardening and very hard structures when hardened. The skin must go from being elas... Read More

biology - Can a planet with a very long day/night harbor life such as Earth?

If your world does not have to orbit once every 1000 days you could have a day/night cycle equally long by making it rotate itself in a way that slows the rate at which it changes its facing sides an... Read More

biology - Could it be possible to augment the human mind and body to perform true multi-tasking?

So this is a tricky one to answer, because the answers vary from "It's impossible to multitask" to "Our body multitasks beautifully every moment of our lives to a degree few comprehend." It all depen... Read More

biology - Floating Ocean Vegetation

If you are looking for free floating sea vegetation, go for the Sargassum Sargassum is a genus of brown (class Phaeophyceae) macroalgae (seaweed) in the order Fucales. Numerous species are distribut... Read More

biology - Effects on the visual systems of humans when temporarily having several stars illuminating the living space

To adequately answer this question, we need to know the spectral class of all of the stars in this system, however, the effects on humans of each of the spectral classes individually can be described... Read More

biology - Best Ergonomic Design for a handheld ranged weapon

I think it should just be a pair of laser binoculars. If you can have a "clean slate" for pure accuracy and aiming purposes, I would make the weapon hit where you look through some binoculars. For ex... Read More

biology - Realistic Horse-sized Dog Breeds

Realistically, a well-trained backpacking dog can carry up to anywhere between 30% and 50% of its weight on its back. While the dog's spine is possibly going to be a problem, that can be worked aroun... Read More

science based - Absorbing heat from unlikely places

What you have described is achemical battery and a thermo-electric heat pump all neatley packaged as a sponge. Researchers at Ulsan National Institute of Science and Technology (UNIST) in South Kore... Read More

biology - How to differentiate between elves and men

You could make a different colour scheme for your elves: just as humans are all shades of brown (from pinky-beige "Caucasian" to dark), with pink or yellow undertones, your elves could be different s... Read More

biology - Is it possible that technologically-capable, spacefaring species would depend on a single source of food?

Consider something like the leaf cutter ant, which eat nothing but fungus, they evolved agriculture long before humans existed. They harvest plant material to farm the fungus and have been doing it f... Read More