One hundred years of phase polymorphism research in locusts

One hundred years ago in 1921, Sir Boris Uvarov recognized that two locust species are one species but appearing in two different phases, a solitarious and a gregarious phase. As locust swarms are still a big problem affecting millions of people, basic research has tried to understand the causes for the transition between phases. This phenomenon of phase polymorphism, now called polyphenism, is a very complex multifactorial process and this short review will draw attention to this important aspect of insect research.

Phase polymorphism and electronic structures of TeSe2

Polymorphic phases of TeSe2 can be transformed into one another, exhibiting either hidden or chiral spin polarization.

Nuclear dynamics and phase polymorphism in solid formic acid

Neutron experiments and simulations solve the formic acid puzzle.