This study aimed to evaluate diurnal and seasonal trends in aerodynamic conductance over a grassland surface. A simple ...

Four years after a global pledge to end deforestation, the amount of money going toward conserving and restoring forests is not enough, the analysis found. By Sachi Kitajima Mulkey President Trump has ...

These questions invite teenagers to share mischievous memories, engage in frightful debates, spin spooky stories and much more. By Natalie Proulx Twenty living hostages were freed by Hamas on Monday ...

Part 1 begins with an overview of properties of the real numbers and starts to introduce the notions of set theory. The absolute value and in particular inequalities are considered in great detail ...

The International Mathematical Olympiad (IMO) is an annual international mathematics competition held for pre-collegiate students. It is also the oldest of the international science olympiads, and ...