THE fragmentation of liquid drops, resulting from their sudden exposure to a high-velocity gas
stream, has many important applications in the fields of aerodynamics and propulsion. For …

A method for calculating the position of the first normal shock, or Mach disc, in the jet behind
a highly underexpanded nozzle is presented. In the calculation for a sonic orifice, the axial …

Most birds breed in pairs but at least 3% of passerine species are cooperative breeders,
whereby more than two adults help to raise the young. The general rarity of cooperative …

Diversification of insect herbivores is often associated with coevolution between plant toxins
and insect countermeasures, resulting in a specificity that restricts host plant shifts. Gall …

Evolutionary radiations are prominent and pervasive across many plant lineages in diverse
geographical and ecological settings; in neotropical rainforests there is growing evidence …

TO DATE there has been considerable experimental and theoretical work devoted to the
study of detonation waves. It has been found that upon ignition of various combustible gas …

Coevolutionary models suggest that herbivores drive diversification and community composition
in plants. For herbivores, many questions remain regarding how plant defenses shape …

Herbaria are unparalleled collections of biodiversity information representing the world's
flora. However, this treasure has remained largely inaccessible to genetic studies, frequently …

Relationships among multilocus genetic variation, geography, and environment can reveal
how evolutionary processes affect genomes. We examined the evolution of an Australian bird…

The propagation of a detonation wave in a tube containing a single stream of 2600‐μ‐diam
diethylcyclohexane droplets dispersed in gaseous oxygen has been studied with streak and …