Editorial
Global Warming and Ecosystem Species Richness: Will rising temperatures decimate earth's biosphere?

Medieval Warm Period Record of the Week
This issue's Medieval Warm Period Record of the Week comes from the Northeastern Caribbean Sea, South of Puerto Rico.

Subject Index Summary
Solar Influence on Climate (Irradiance Measurements): How good is the evidence for variable solar activity being the primary determinant of earth's ever-changing climate?

Journal Reviews
Millennial-Scale Cycling of Climate, Southeast Scotland: What does it imply about the planet's current climatic status?

Gullies Galore in Slovakia: From whence and when did they come?

The Little Medieval Warm Period in Northeastern China: How did its warmth compare with that of the late 20th century?

Grassland Species Richness and Soil Carbon Sequestration: How does ecosystem biodiversity impact the rate at which carbon is removed from the atmosphere and sequestered in the soils of grasslands?

Red Wines of the Future: Will their character be impacted by rising atmospheric CO2 concentrations?