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Behavioral experiments reveal that ants, contrary to humans, avoid the formation of traffic jams at extreme density.

Environmental transmission is atypical of symbionts that have undergone genome degradation, yet genetically reduced deep-sea anglerfish symbionts likely persist in the deep sea biome in search of a new host.

Sperm and egg development are temperature sensitive, enabling males and females to significantly improve their reproductive success by matching gamete function to varying thermal environments for fertilisation and offspring development.

Adversities experienced by female baboons early in life can affect the survival of their offspring years later.

In wild baboons, a female's adverse early experiences can influence her offspring's survival years after the original adversity was experienced.

Despite risks of infection and reduced fitness, tooth fracture frequency in gray wolves increases rapidly when prey are scarce because they must consume carcasses more completely.

By changing the smell of their host, entomopathogenic nematodes attract future hosts and increase their predation success.

After insemination, honeybee queens experience a rapid reduction in vision and flight performance, consistent with an ongoing sexual conflict over the number of mating flights that queens embark on.

Bar-headed geese lower their flight metabolic rates to fly in low-oxygen conditions.

Measurements of bar-headed geese flying in a wind tunnel in hypoxia reveal that these birds sustain aerobic flight at high altitude via a reduction in metabolism.