A thousand-foot-long ice core from the Tibetan Plateau provides a detailed climate record for the last 130,000 years, with some sections dating back potentially over 500,000 years. The analysis reveals significant changes in temperature and greenhouse gas levels during this time period.
Researchers use strontium isotopes to identify salmon stream origins, allowing for unprecedented accuracy in tracking adult salmon. The technique has promise for restoring salmon populations and studying their migrations.
A new biodiversity theory suggests that protecting ecotones along rainforest periphery is crucial for preserving biodiversity. Ecotones, the transition zones between rainforests and savannas, may be integral to generating biodiversity in tropical rain forests.
A new study reveals that tissue macrophages play a critical role in triggering the production of HIV in patients with AIDS, leading to increased virus levels despite declining CD4 T cell counts. This finding highlights the importance of controlling opportunistic infections to slow the cycle of virus production.