Why Is Blood Pressure Two Numbers?
Blood pressure might better be called heart pressure, for the heart's pumping action creates it. To measure blood pressure, health workers determine how hard the blood is pushing at two different times: when the heart contracts, called systole; and when the…
Continue reading →
More science facts
Geology
Glaciers: Rivers of Ice
Glaciers are massive sheets of ice that occur on every continent of the world except Australia. These giant…
Biology
What We Learned From The Songbirds
Once, neuroscientists believed that our complement of nerve cells was created prenatally and during the first…
Geology
Retreating Glaciers Spur Alaskan Earthquakes
Could an extra warm summer cause an earthquake in your backyard? Probably not... unless you live in Alaska.…
Astronomy
Big Fish
The phrase 'big fish eat little fish' may hold true when it comes to planets and stars. Perhaps as many as 100…