$100 million pesticide deal

50 Million Announced Forty Years Ago 100 Million Mexicans… Only

1% in 2000. Although the objective was far from being reached (the current rate being close to 2%), in 2000 Mexico had 53 million inhabitants fewer than it would have had if fertility had remained at its 1970 level. The population pyramids of 1930, 1970 and 2000 clearly illustrate this dynamics (Figure 2). In 1930 the population was beginning to recover from the aftereffects of the Revolution a...

Evolution of carbon cycle over the past 100 million years

It is generally accepted that progressive cooling of global climate since the Late Cretaceous results from decreasing partial pressure of atmospheric CO2 (pCO2). However, details on how and why the carbon cycle evolved and how it would affect pCO2 have not been fully resolved. While the long-term decline of pCO2 might be caused by the decrease of volcanic degassing through the negative feedback...

Feasibility study of GeoFEM for solving 100 million DOF problems

GeoFEM is a parallel FEM code to analyze solid earth. This report describes large-scaled structural analysis features of the code. One of the purposes for GeoFEM/Tiger version consists in 100 million degree of freedoms (DOF) analysis by parallelized FEM. Here, we discuss the problem to be solved by GeoFEM, the method to enable such a large-scaled structural analysis and its visibility. GeoFEM a...

Brood care in a 100-million-year-old scale insect

Behavior of extinct organisms can be inferred only indirectly, but occasionally rare fossils document particular behaviors directly. Brood care, a remarkable behavior promoting the survival of the next generation, has evolved independently numerous times among animals including insects. However, fossil evidence of such a complex behavior is exceptionally scarce. Here, we report an ensign scale ...

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