Individual dietary specialization is impacted by development, social learning, genetics, and environment. Here, the authors document European brown bear diet in a multigenerational female sample, finding that social learning during rearing was the most important contributor to dietary specialization.

Acidification and warming enhance the productivity and nutrient assimilation of Pocillopora damicornis coral larvae, without destabilizing its symbiosis with intracellular algae.

Trapped in rock fractures miles below the surface are saline waters that have been isolated for millions of years. In these most remote environments exists an active turnover of dissolved organic molecules, an active carbon cycle.

A warming climate can alter the food sources that support animals in Arctic ecosystems. Now, research provides empirical evidence of such a shift, with widespread implications for global carbon cycling.

An innovative isotopic labelling strategy shows that malaria mosquitoes in the West-African Sahel region survive in dormancy over the prolonged dry season. These results have implications for efforts to suppress malaria transmission in Africa.

Gerbrand Koren discusses how measurements of Δ¹⁷O in CO₂ can improve estimates of photosynthesis and its response to environmental conditions.

Dissolved iron is mysteriously pervasive in deep ocean hydrothermal plumes. An analysis of gas, metals and particles from a 4,000 km plume transect suggests that dissolved iron is maintained by rapid and reversible exchanges with sinking particles.

Carbon dioxide can stimulate photosynthesis in trees and increase their growth rates. A study of tree rings from three seasonal tropical forests shows no evidence of faster growth during 150 years of increasing atmospheric CO₂ concentrations.

Radioactive isotopes nail the timeline of Egyptian dynasties.