Introduction: The first velvet worm (phylum Onychophora) was described nearly two centuries ago, by a British priest, in the tiny Caribbean island of Saint Vincent. He thought it was a new type of mollusk, a slug with tiny feet. Objective: Here I present a brief biographical account of the field of onychophorology, marking nearly two hundred years since the first scientific description of velvet worms. Method: I synthetize historical records, publications, personal experience and biographical sketches to construct an encompassing narrative of the field's development through the lives of researchers who have shaped it. Results: The narrative begins with Lansdown Guilding's initial discovery and extends to include pivotal figures like Jean Victor Audouin, Charles Émile Blanchard, Adolph Eduard Grube, Lorenzo Camerano, Eugène Louis Bouvier, Sidnie Milana Manton, Sylvia S. Campiglia, Roger Lavallard, Hilke Ruhberg, and Bernal Morera-Brenes. Contributions from Noel Tait, Robert Mesibov, Georg Mayer, Cristiano Sampaio, Ivo de Sena Oliveira, and José Pablo Barquero-González are also acknowledged. The article highlights their individual contributions to onychophorology, considering their scientific achievements and personal journeys, and presents portraits of nearly all of them. Conclusion: Our current knowledge of onychophorans is the results of hundreds of contributions from a large number of people who have lived varied, sometimes fascinating lives, but all united in their interest in velvet worms.

Velvet worms, or onychophorans, include placental species and, as a phylum, have survived all mass extinctions since the Cambrian. They capture prey with an extraordinary adhesive net that appears in an instant. The first naturalist to formally mention them was Lansdown Guilding (1797-1831), a British priest from the Caribbean island of Saint Vincent. His life is as little known as the history of the field he initiated, onychophorology. This is the first general history of onychophorology, and I have divided it into half century periods. The beginning, 1826-1879, was defined by former students of great names in the history of biology, like Cuvier and von Baer. This generation included Milne-Edwars and Blanchard, and the greatest advances came from France, with smaller but still important contributions from England and Germany. In the 1880-1929 period, work concentrated in anatomy, behavior, biogeography and ecology, but of course the most important work was Bouvier’s mammoth monograph. The next half century, 1930-1979, was important for the discovery of Cambrian species; Vachon’s explanation of how ancient distribution defined the existence of two families; Pioneer DNA and electron microscopy from Brazil; and primitive attempts at systematics using embryology or isolated anatomical characteristics. Finally, the 1980-2020 period, with research centered in Australia, Brazil, Costa Rica and Germany, is marked by an evolutionary approach to everything, from body and behavior to distribution; for the solution of the old problem of how they form their adhesive net and how the glue works; the reconstruction of Cambrian onychophoran communities, the first experimental taphonomy; the first country-wide map of conservation status (from Costa Rica); the first model of why they survive in cities; the discovery of new phenomena like food hiding, parental feeding investment and ontogenetic diet shift; and for the birth of a new research branch, Onychophoran Ethnobiology, founded in 2015. While a few names appear often in the literature, most knowledge was produced by a mass of researchers who entered the field only briefly.

The negative impact of the modern-day lifestyle on the environment is aggravated during the COVID-19 pandemic through the increased use of single-use plastics from food takeaways to medical supplies. Similarly, the closure of food outlets and disrupted supply chains have also resulted in significant food wastage. As the pandemic rages on, the aggravation of increased waste becomes an increasingly urgent problem that threatens the biodiversity, ecosystems, and human health worldwide through pollution. While there are existing methods to deal with the organic and plastic waste, many of the solutions also cause additional problems. Increasingly proposed as a natural solution to man-made unnatural problems, there are insect solutions for dealing with the artificial and organic waste products towards a circular economy, making the use of natural insect solutions commercially sustainable. This review discusses the findings and how some of these insects, particularly the Hermetia illucens, Tenebrio molitor, and Zophobas morio, can play an increasing important role in food and plastics, with a focus on the latter.