The origin of the Christmas tree? Bill Petro : It is generally believed that the first  Christmas tree  was of German origin dati...

According to the National Institute of Mental Health, there are many symptoms of depression, such as difficulty concentrating, rememberi...

The Great Lakes get dumped with 1000 metric tons of plastic each year. Birds living in variable environments have bigger brains . Sp...

Paleontologists have discovered a tiny dinosaur’s fluffy tail preserved inside a drop of amber .  You can find their findings ...

The origin of the Christmas tree? Bill Petro : It is generally believed that the first Christmas tree was of German origin d...