Rare 'firework morphology' of supernova remnant Pa 30 may be due to white dwarf wind

In 1181 AD, a bright "guest star" was observed to linger in the sky for around six months. Nearly 850 years later, the likely ...
BMJ

Primary cam morphology; bump, burden or bog-standard? A concept analysis

Correspondence to Dr H Paul Dijkstra, Department of Medical Education, Aspetar Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar; Paul.Dijkstra{at}aspetar.com Design We conducted a concept ...
BMJ

Severe pincer morphology is associated with incident hip osteoarthritis: prospective individual participant data from 18 935 hips from the World COACH consortium

Objective To assess the relationship between pincer morphology and incident radiographic hip osteoarthritis (RHOA) and study-specific subgroups. Methods Hips completely free of RHOA at baseline and ...