As the heart muscle contracts, it propels the blood out into the vascular system. The heart’s chambers and valves are arranged to direct the flow of the blood as the heart beats. The heart has two ...

In his book The Mathematical Universe, mathematician William Dunham wrote of John Venn’s namesake legacy, the Venn diagram, “No one in the long history of mathematics ever became better known ...

It’s been seven days since the 47th president of these United States pretended to put one hand on the Bible and promised before God and a bevy of billionaires to uphold the the Constitution of ...