Subtitles section Play video Print subtitles Smart Learning for All Why does our voice sound different when recorded? Our inner ear detects sound vibrations informing our brain about the voice or sound and thus, helping us hear. But did you know that when we speak, we hear our own voice in two different ways. What? In two different ways. Indeed. The first way is through our outer ear. Our voice travels to the outer ear creating vibrations in the eardrum. These vibrations eventually reach the inner ear. While the second way is through our flesh and skull bones. However, they are better at transmitting deeper, lower frequency sounds as compared to shriller. Higher frequency sounds. As a result, the combination of sounds obtained from the two ways makes our voice appear deeper. Now, when we hear our recorded voice, we only hear the voice which has traveled through our outer ear. Hence, our voice sounds different when recorded. Why does airplane food taste bad? I don't know. Wait. I will explain. Our ability to perceive taste is affected by a few factors such as humidity, air pressure, etc. In an airplane, the humidity is less as compared to that on the ground. This makes the air in the airplane quite dry. Also, to maintain the air pressure inside and outside the airplane The air pressure inside it is decreased. Decreased air pressure and dry air, dries our nose and mouth. Dry nose cannot properly smell odors. Yes. I am not abe to smell the burger. Now, smell of food helps us to understand the flavor and ingredients of the food. Thus, the food which we cannot smell properly appears unappealing. Also, dry mouth reduces the sensitivity of our taste buds. As a result, we cannot perceive the taste of food properly. Why can't dogs eat chocolates? Because I would love to have all the chocolates for myself. All right. Now listen. Chocolates and other cocoa products contain a toxic component called theobromine. The darker the chocolate, the more theobromine and the more it is harmful. But I eat chocolates. And I am completely fine. Our body quickly metabolizes the theobromine. Thus, it is not quite harmful for us. However, dogs process theobromine much more slowly. So, it stays in their bodies for a longer time, resulting in vomiting, diarrhea, etc. Moreover, if large quantities of chocolate are ingested by the dog. The effects can be much more severe. The heart rate of the dog might beat twice its normal rate, increasing the blood flow. This can prove to be lethal to the dog. Why do mosquito bites itch? Because mosquitoes don't brush before biting. No. A mosquito doesn't actually bite. What? It doesn't bite. No. A mosquito sucks our blood through a straw like structure called proboscis. A proboscis is made up of six parts. Out of the six parts, four parts are used to pierce into our skin and blood vessels. Hold the tissues apart. Through the fifth part called hypopharynx. The mosquito drops its saliva containing an anticoagulant. Anticoagulant prevents the blood from clotting. So that the sixth part of proboscis called labrum can easily suck up the blood. Now, our immune system recognizes the anticoagulant as an invader. Hence, it releases histamine. Histamine dilates the blood vessels so that blood along with immune cells can come to attack the invaders. Heal the affected area. This histamine causes the itchy feeling. How do bees make honey? No idea. To make honey, the worker honeybee sucks nectar from flowers and stores it in its honey stomach. Once the worker bee returns to the hive, it vomits the nectar into a processor honeybee's mouth. In the processor bee's mouth and stomach, an enzyme called invertase is added to the nectar. Invertase breaks some nectar into simple sugars like glucose and fructose. Then it vomits the partially converted nectar into another processor bee's mouth. Who also adds more invertase, helping breakdown more nectar. This process goes on until most of the nectar is converted into simple sugars. Then the mixture of simple sugars is stored in the honeycomb. At this point, the mixture is still watery. Hence, the bees flap their wings which evaporates water and thickens the mixture to eventually form honey. For more educational videos please visit http://www.SmartLearningforAll.com Also, don't forget to subscribe to our YouTube channel.