Feb 14, 2018 · In other animal species, we sometimes notice differences in appearance that allow us to group them… usually into subspecies. So why can’t we sort the human species into smaller groups …

May 5, 2021 · When did we first discover fire? Every human culture on earth makes and uses fire. It has been our companion for a long, long time. In fact, humans have been using fire since before we …

May 12, 2017 · There are many similarities between humans and other animals that you may have noticed. Humans and animals both eat, sleep, think, and communicate. We are also similar in a lot of …

Apr 18, 2015 · Human, Bird, and Bat Bone ComparisonFrom the outside human arms, bird wings, and bats wings look very different. Humans are covered in skin, birds are covered in feathers, and bats …

Jul 12, 2019 · For many organisms, reproduction is a huge part of life. But what, exactly, does reproduction mean? Well, it can mean so many different things, including breeding or not, caring for …

Aug 20, 2020 · Kangaroo Species There are four species of great kangaroos, which are the largest marsupials in the kangaroo family. This family is called “Macropodidae,” which means “large foot.” …

A karyotype is a complete set of chromosomes from an organism or species. This is a human male karyotype. In the red box, you see the sex chromosomes. Image by the NHGRI.

Jun 21, 2017 · Scientists hypothesize that, over the course of human evolution, sleep patterns changed as we developed higher intelligence. Lesser apes evolved earlier, and so they are thought to have …

Do Humans Have Better Color Vision Than Animals? It is true that we see more colors than some animals. Your pet dog and cat sees fewer and weaker colors. Their view of the world is made of …

Oct 1, 2018 · People have been interested in how our bodies work for a long time. Aristotle (384-322 B.C.), an ancient Greek philosopher, was among the first people to think about the structure and …