Ecology

Remoras hide in the cloaca of manta rays: the curious behavior of hitchhiking fish

Remoras hide in the cloaca of manta rays: the curious behavior of hitchhiking fish

Remora attached to a Great Oceanic Manta Ray (Manta birostris). The hesitations they are those fish that cling to other larger animals such as manta rays, sharks and turtles thanks to a kind of suction cup on their heads to be transported for free across the ocean. A study published in April 2026 in the journal Ecology and Evolution has ...

We have dismantled an automatic mechanical watch: what changes compared to quartz ones?

We have dismantled an automatic mechanical watch: what changes compared to quartz ones?

We all have our eyes on clocks every day but perhaps not everyone knows exactly how they work. For example: why do the second hands move jerkily in some watches while in others they move much more smoothly? And what is the mechanical component responsible for the classic “tic tac”? In this video we clarify these and many other aspects, ...