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  • The Five Senses | Ask A Biologist
    Humans and many other animals have five main senses that help them understand the world around them How do each of these senses work, and what happens when they don’t work properly? Starting here, you can take a tour of the senses that many animals, including humans, experience: Explore how each of our five senses work Image by Allan
  • Why Study Animals | Ask A Biologist
    Why Do Scientists Study Animals?Scientists and others have many reasons for why it can be both good and bad to use animals for research In the table are examples of both sides of this debate And below we provide more details for each side
  • What Are Human Chimeras? | Ask A Biologist
    How are chimeras different from other humans? They have genetic differences, but you could never guess someone is a chimera just by looking at them Chimerism is very rare; only about 100 cases have been recorded in human history That might be because no one knew to look for it, though In animals, chimerism can be colorful, like in these
  • Color Vision | Ask A Biologist
    Color blindness is fairly common, affecting about nine percent of all humans It is much more common in men than in women To test for color blindness a special picture called an Ishihara test is used If you jump to our color test page you will be able to test yourself and also experience another interesting phenomenon of our color vision
  • Can humans be split into races? | Ask A Biologist
    Humans also migrate and reproduce a lot Different groups of humans are never apart long enough for genetic differences to add up Human DNA is too similar to split us into subspecies, or into “races ” So we can't use biology to sort people into groups like we can with other animals Can we group people based on physical appearance?
  • Insect and Human Similarities | Ask A Biologist
    How are Insects and Humans Similar?Humans and insects have very different bodies But there are many ways in which the two are actually very similar Because of these similarities, studying insect physiology is helpful for medicine and agriculture How much of your DNA do you think is the same as a fruit fly's? Would you have guessed 60%? That's right, 60% of the DNA code of fruit flies and
  • Human Animal Differences | Ask A Biologist
    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 the ways our bodies work But we also have a lot of differences Are there any differences that set humans apart, uniquely, from all other animals?
  • Colors Animals See | Ask A Biologist
    Humans see the world differently than most other animals We have three types of cones that detect different colors in what are called the visible light waves Here we see how a person with normal color vision sees a butterfly
  • Comparative Animal Development | Ask A Biologist
    Humans and many other animals (like most birds, reptiles, and mammals) have a type of development called direct development In direct development, the young look very similar to their adult form, and during development, they mainly become larger
  • Animals in Research | Ask A Biologist
    Animals are often used to study many different scientific topics But many scientists and others argue whether it's ok to use animals for this purpose Here we discuss why scientists use animals and research, and discuss some of the rules and regulations in place to help protect animals used in research





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