A Rare Isotope Helps Track an Ancient Water Source

A Rare Isotope Helps Track an Ancient Water Source

The Nubian Aquifer, the font of fabled oases in Egypt and Libya, stretches languidly across 770,000 square miles of northern Africa, a pointillist collection of underground pools of water migrating, ever so slowly, through rock and sand toward the Mediterranean Sea.

Weird World Of Water Just Got Weirder

Link: Weird World Of Water Just Got Weirder

Strange, stranger, strangest! To the weird nature of one of the simplest chemical compounds — the stuff so familiar that even non-scientists know its chemical formula — add another odd twist. Scientists are reporting that good old H2O, when chilled below the freezing point, can shift into a new type of liquid. The report appears in ACS’ Journal of Physical Chemistry B.

Interactive Periodic Table

Link: Interactive Periodic Table

The Elements Revealed: An Interactive Periodic Table

Whether gas, liquid or solid; radioactive or stable, reactive or inert; toxic or in your vitamin pill, the 118 building blocks each has its own chemically idiosyncratic characteristics, along with certain commonalities. See what makes your favorite element unique on this interactive periodic table