Hydrogen-based steelmaking gets 2x boost from nickel oxide catalyst, study finds

A debate has been raging among planetary scientists for more than a decade—why are there so few exoplanets with a radius of about 1.8 times that of Earth? Exoplanets are currently largely grouped into two distinct categories—"super-Earths" are below that size and have rocky interiors, whereas "sub-Neptunes" are above that size limit and appear puffier. But researchers don't really understand why the path of planetary evolution forces this bifurcation. A new mission proposal, called the Early eVo

Few animals put on a show quite like manakins. In the rainforests of Central and South America, males of these small tropical birds, with strikingly bright plumage, often gather at communal display sites (leks), where they clear their own dance courts and spend much of their lives performing high-speed backflips, snapping their wings like firecrackers, and running through choreographed routines with other males, all to attract a mate.

Many insects will eat almost anything in their sight, such as certain beetles, grasshoppers and locusts, while others are remarkably picky eaters. For example, numerous insect herbivores will feed only on a single plant family or a specific type of tree. But why is this so?