Rates of origination and extinction for marine animal genera dropped to low levels in latest
Mississippian time, immediately after massive glaciers formed in the Southern Hemisphere …

Research on the attrition of teachers of color suggests that, under certain organizational
conditions, they leave teaching at higher rates than other teachers. Additionally, research has …

… 285 Ma) (Stanley and Powell, 2003). To investigate the causal changes in the biota
underlying these global evolutionary patterns, a database of stratigraphic and geographic …

Aim Peak marine taxonomic diversity has only rarely occurred at or near the equator during
the Phanerozoic Eon, in contrast to the present‐day pattern. This fundamental difference is …

… using BEAM chemotherapy (carmustine 300 mg/m 2 day −6; etoposide 200 mg/m 2 once a
days −5 to −2; cytarabine 200 mg/m 2 every 12 h days −5 to −2; melphalan 140 mg/m 2 day −…

Existing reconstructions of the Phanerozoic history of biological diversity are based on
occurrences of taxa and do not include abundance data. This study examines trends in the …

… Changes in mean geographical range size have been linked to suppressed macroevolutionary
rates of brachiopods during the late Palaeozoic ice age (Powell, 2005), but this study …

Purpose The aim of this study is to determine the effect of background noise on the intelligibility
of dysphonic speech and to examine the relationship between intelligibility in noise and …

Geographic range size is one of the few traits that promoted survivorship during both mass
and background extinctions, but the exact reason (or reasons) why a large geographic range …

Randomized controlled trials are not always feasible in educational research, so researchers
must use alternative methods to study treatment effects. Propensity score matching is one …