Coherent deglacial changes in western Atlantic Ocean circulation.

Abrupt climate changes in the past have been attributed to variations in Atlantic Meridional Overturning Circulation (AMOC) strength. However, the exact timing and magnitude of past AMOC shifts remain elusive, which continues to limit our understanding of the driving mechanisms of such climate variability. Here we show a consistent signal of the Pa/Th proxy that reveals a spatially coherent picture of western Atlantic circulation changes over the last deglaciation, during abrupt millennial-scale climate transitions.

Sonographic fetal sex determination.

Although sonographic fetal sex determination is feasible in most pregnancies, in some cases, it may pose difficulties. An attempt to determine the fetal sex should not be made before 12-weeks' gestation because this early, it is relatively inaccurate. After 13 weeks, it is accurate in 99% to 100% of cases without malformed external genitalia.

Mapping the sources of urban dust in a coastal environment by measuring magnetic parameters of Platanus hispanica leaves.

Tree leaves accumulate atmospheric particles on their surface, and a fraction of these particles exhibits magnetic properties that can be used to determine the spatial distribution of atmospheric dust in an urban area. This observation is exploited here to map sources of atmospheric pollutants in the coastal city of Vigo. The magnetic carriers on the leaves were iron oxide spherules (5-10 microm) and larger iron-bearing particles (typically 10-50 microm).