… very strange objects indeed. Imagine, if you will, an object resting in the vast emptiness of space, totally undetectable except for its gravitational pull. Imagine an object so massive, and so densely packed, that not even light can escape its immense…

… wondering and dreaming of what lies beyond our planet. The universe that we live in is so diverse and unique, and it interests us to learn about all the variance that lies beyond our grasp. Within this marvel of wonders our universe holds a mystery…

… can escape their gravity, and since nothing can travel faster than light, nothing can escape from inside a black hole . Loosely speaking, a black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object…

… can escape, even light. It is impossible to see a black hole directly because no light can escape from them; they are black. But there are good reasons to think they exist. When a large star has burnt all its fuel it explodes into a supernova. The…

… of prokaryotic, principally photosynthetic organisms. Cyanobacteria resemble the eukaryotic algae in many ways, including morphological characteristics and ecological niches, and were at one time treated as algae, hence the common name of blue-green…

… the atom as a "plum pudding." That is, it was roughly the same thing throughout, with negatively charged electrons scattered about in it like raisins in a pudding. As part of an experiment with x-rays in 1909, Rutherford was shooting a beam of…

… a wide choice of career opportunities, a fair salary, and an exciting life. If you prepare yourself with a good education and a positive attitude, you’ll be well on your way to becoming a successful botanist. Anyone can find enjoyment and fulfillmen…

… by the ballooning of the wall of an artery or a vein. An aneurysm can cause a threat to health. It may rupture and bleed in the tissues of the brain, causing serious, even mortal brain damage. This happens because the blood floods the brain and kills…

… stretches almost 2700 miles from the bottom of the Andes Mountains eastward to the Atlantic Ocean. It borders on every country of the continent except for Chile and Ecuador. Brazils official name is the Federative Republic of Brazil. Brazil occupies…

… inflammation of the bronchi. It may develop suddenly, following a head cold (acute bronchitis), or it may persist or return regularly for many years, causing progressive degeneration of the bronchi and lungs (chronic bronchitis). Certain people are…