How and why diverse sexual systems evolve are fascinating evolutionary questions, but few empirical studies have dealt with these questions in animals. Pedunculate (gooseneck) barnacles show such diversity, including simultaneous hermaphroditism, coexistence of dwarf males and hermaphrodites (androdioecy), and coexistence of dwarf males and females (dioecy). Here, we report the first phylogenet...

in order to study the signs of œstrus in the west african dwarf goat, 28 non pregnant females younger than 24 months of age were used. most of them (94.7%) had waggled the tail during heat. the frequency of micturition was higher in the presence of the male. the swelling of the vulva was observed in 68.4% of goats in heat. the cervico-vaginal mucus was significantly (p≤0.05) abundant and elasti...

An unresolved, likely L dwarf companion to the DA white dwarf GD1400 is reported. This would be only the second such system known, discovered 17 years after the prototype L dwarf, GD165B, was determined to be a companion to a white dwarf. Photometric observations and model predicted stellar parameters of the well studied white dwarf primary indicate that GD1400B has J−K & 2.0 and MK = 12.13 mag...

Nanotechnology a word stemmed from Greek origin means the dwarf. In the modern science, a nanometer means one billionth of a meter of something. The science of nanotechnology is therefore the ability to manipulate these tiny particles. Nanotechnology is increasingly employed to explore the unseen avenues of medical sciences. There are many types of nanoparticles that are used in medicine and ot...

While stars are often found in binary systems, brown dwarf binaries much rarer. Brown dwarf--brown pairs typically difficult to resolve because they have very small separations. Using dwarfs discovered with data from the Wide-field Infrared Survey Explorer (WISE) via Backyard Worlds: Planet 9 citizen science project, we inspected other, higher resolution, sky surveys for overlooked cold compani...

The Virgo cluster is the most prominent nearby cluster of galaxies. It is constituted from a large number of galaxies spreading over a full range of luminosities and very diverse morphological types (spirals, dwarf and giant ellipticals, irregulars, interacting systems, etc.). This diversity de nes the Virgo cluster as the perfect laboratory to study environmental e ects on galaxy evolution due...

We review the systematic properties of “dwarf” elliptical (dE) galaxies, focussing on the relation between “normal” and “dwarf” ellipticals. In recent years, this relation has been described as “dichotomy” – based essentially on a discontinuity in central surface brightness. We show that, outside of 300 pc from the centre, the Sérsic profile parameters vary continuously from “normal” to “dwarf”...