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8

Pheromones. These are chemical agents similar to hormones, but are excreted from the human body and used externally on other creatures of the same species, rather than internally. The thing is that humans have very weak pheromones, if at all, though numerous online retailers will do their best to convince you otherwise. That said, it's very easy to say ...


8

Feared by whom? The bluebottle does not fear the lion. The elephant also doesn't much fear the lion*. *exceptions apply Here lies your most important factor. Life seeks niches where there isn't too much competition, and where there is a niche there is more life. Each form of life fears its own predators, but to a lion the fly is a minor irritant. If the ...


7

Despite their reputation for being dangerous locations, if you want an environment that breeds aggressive animals, you probably don't want a rainforest. The complex topology of rainforests gives them a lot of hiding spots, favoring a hide-or-ambush predator-prey game, rather than bloody brawling. In fact this is the main reason why they are so dangerous to ...


4

The reduced gravity would help a bit to produce bigger trees but I wouldn't expect more than a 10-20% increase. What would make life very difficult would be the high level of oxygen in the atmosphere especially at the higher pressure. Wild fires would be an enormous risk as would storms so the giant redwood trees might not get a chance to grow to maximum ...


3

Can I introduce you to the recognised concept of a Highly Sensitive Person who has: "an increased sensitivity of the central nervous system and a deeper cognitive processing of physical, social and emotional stimuli". The trait is characterized by "a tendency to 'pause to check' in novel situations, greater sensitivity to subtle stimuli, and the ...


2

There's precedent for animals which can detect medical problems by scent, for example dogs which are trained to identify the smell of malaria. There are also plenty of genetic mutations which could cause a difference in scent. For example, the ABCC11 gene can differentiate if a person has underarm sweat or the consistency of their earwax. It wouldn't be ...


1

Before getting stuck in: Ocean life has a longer and richer evolutionary history because life came on land only after it had existed in the oceans for some considerable time. So if you want examples of aggressive and richly evolved animals, and plants for that matter, look at aquatic life. There are several card games on the market where you have a variety ...


1

There are many possibilities. The people might well excrete a chemical signal from their skin as you describe. This might take the form of a distinctive smell, an odourless pheromone or simply be a chemical that the “mutant” humans use for one purpose that the dragons use for another. It is also possible that the people have mutant vocal cords and their ...


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