DO SUTURE ZONES EXIST?

Do suture zones exist?

Remington (1968) argued that 13 suture zones exist in North America. Remington defined a suture zone as, "a band of geographic overlap between major biotic assemblages, including some pairs of species or semispecies which hybridize in the zone" (p. 322). Although initially controversial, the idea that suture zones exist has picked up momentum over the past decade, due largely to the phylogeogra...

Management of Candiduria: Grey Zones Still Exist

Critically ill patients are a susceptible group for opportunistic Candida infections. The major risk factors identified with candiduria are extremes of age, female sex, diabetes mellitus, use of immunosuppressive agents, interruption of the flow of urine, radiation therapy, and so on. However, in nosocomial settings, the major risk factors are the use of urinary catheters and the prior use of b...

Do Black Holes Exist?

Proof that black holes exist will likely require confirmation of the existence of event horizons. The common assumption that the mere existence of large compact masses proves the case for black holes is an unwarranted extrapolation of General Relativity into a strong-field regime where it has not been adequately tested. Neither the large compact masses of galactic nuclei nor the massive compact...

Do discrete emotions exist?

Do Pioneer Cells Exist?

Most mathematical models of collective cell spreading make the standard assumption that the cell diffusivity and cell proliferation rate are constants that do not vary across the cell population. Here we present a combined experimental and mathematical modeling study which aims to investigate how differences in the cell diffusivity and cell proliferation rate amongst a population of cells can i...