Natural Sciences

Dark energy a headache long before discovery

January 8, 2013 | Natural Sciences

A new review of century-old letters between two of the world’s leading physicists suggest dark energy was proving an headache well before it was discovered.

HANDBOOK OF THE BIRDS OF THE WORLD, VOLUME 15: WEAVERS TO NEW WORLD WARBLERS

January 13, 2012 | Natural Sciences

But hardly a note would then be spared for one of the world’s most spectacular but sadly decimated bird families, the Hawaiian honeycreepers (Drepanididae). Thankfully, Volume 15 gives them ample space, abutting the expansive treatment of their parent family, the nearly globally successful finches (Fringillidae, native everywhere but Australasia).

GENDER ASSIGNMENT OF WESTLAND PETRELS (PROCELLARIA WESTLANDICA) USING LINEAR DISCRIMINANT FUNCTION ANALYSIS

January 13, 2012 | Natural Sciences

Both cryptic and measurable sexual differences, including size dimorphism, are common in birds (Dale et al. 2007), but assignment of differences between females and males based on measurements needs to be confirmed with independent techniques (e.g., using anatomical or molecular methods) (Kahn et al. 1998, Daniel et al. 2007, Igic et al. 2010).

Trend: How Solid is Supersolid?

December 19, 2011 | Natural Sciences

Macroscopic quantum properties of helium-4, one of the simplest and oldest elements in the universe, continue to puzzle and amaze scientists. Supertransport in solid helium-4 is the most elusive and controversial conundrum of all.

The chemistry of cocaine

October 27, 2011 | Natural Sciences

Engaging undergraduate organic chemistry students is often very challenging. It requires special effort to generate enthusiasm for learning such seemingly abstract concepts as functional group chemistry, synthetic routes, and reaction mechanisms. Students often do not see the relevance of these concepts to their own lives or interests.

The Interaction Between Deep Convection and Easterly Waves over Tropical North Africa: A Weather State Perspective

September 14, 2011 | Natural Sciences

The interaction between deep convection and easterly waves over tropical North Africa is studied using a weather state (WS) dataset from the International Cloud Climatology Project (ISCCP) and reanalysis products from the European Centre for Medium-Range Weather Forecast, as well as radiative fluxes from ISCCP and a precipitation dataset from the Global Precipitation Climatology Project.

Commentary on providing services to students with autism spectrum disorders; Autism Focus

July 7, 2011 | Natural Sciences

The reported prevalence of ASDs in the United States as well as in other developed countries has increased dramatically in the last few years.

Checklist of the Birds of New Zealand, Norfolk and Macquarie Islands, and the Ross Dependency, Antartica

June 20, 2011 | Natural Sciences

The islands of the New Zealand archipelago and the region around the New Zealand base on Ross Island, Antarctica, are true ornithological hotspots. Both enthusiasts and scientists flock to visit New Zealand to spot endemic avian lineages, make natural history discoveries, and test critical behavioral and ecological theories; they also experience and learn from pioneering conservation management to protect a unique avifauna in the face of imminent extinction caused by introduced mammals.

Density-dependent growth and reproduction of Microstegium vimineum in contrasting light environments

May 27, 2011 | Natural Sciences

The invasive grass Microstegium vimineum (Trin.) A. Camus grows in dense monocultures beneath the canopy of woodlands in eastern North America and along sunny forest edges. This annual matures seeds in chasmogamous (CH) spikelets on terminal racemes and cleistogamous (CL) spikelets on axillary racemes.

Synoptically Driven Arctic Winter States

May 4, 2011 | Natural Sciences

The dense network of the Surface Heat Budget of the Arctic (SHEBA) observations is used to assess relationships between winter surface and atmospheric variables as the SHEBA site came under the influence of cyclonic and anticyclonic atmospheric circulation systems.