Protective collars are considered a bearish-to-neutral strategy. The loss in a protective collar is limited, but so is the potential upside. Collars are one of the many risk-reversal strategies ...

Negro and his team’s latest research suggests instead that the barn owl’s brilliant white plumage is in fact a form of nocturnal camouflage or counter-illumination that gives the hunter an ...

Among its remarkable qualities, the film's coordination of live animals provides its most spectacular images. The four-legged wayfarers descend upon Chixia, an industrial town in north-western ...