Cool facts about the ISS: Total length: 108 meters. Total width: 73 meters. Time to orbit the earth: 91 minutes. Astronauts see 16 sunrises and sunsets a day as the ISS orbits Earth once every 90 minutes. The first piece of the ISS went up in 1998. A crew has continuously lived on board […]
Do you know the difference between Invertebrates and Vertebrates? In the animal kingdom many animals have no internal skeleton or even a backbone (spinal column). We call animals without a backbone or skeleton invertebrates. Those that have a skeleton are called vertebrates. Examples of vertebrates include fish, birds, reptiles, and mammals. Humans are considered to […]
Do you consider yourself to be an expert on animals? If so, see how you do on this animal quiz. Did anyone get all of them correct ?