Category Science

Which animals are the closest relatives of elephants?

          If you think that a huge animal like the elephant should have at least a relative at least half its size, you are wrong! The closest kin of the tusker is a puny-sized animal called the rock hyrax. Our amazement will see no bounds when we learn that this animal does not weigh more than four kilograms! The rock hyrax is a small, furry herbivore native to Africa and the Middle East.

          Although hyraxes are tiny in comparison, there are a few physical traits that are share with the elephant. A rock hyrax has little tusks that are similar to those of the elephant. They grow from their incisor teeth. Most mammals with tusks develop them from their canine teeth. These animals have flattened nails on the tips of their digits too. The manatee also shares a common ancestry with the elephant. There was another relative called Tethytheria, which died out more than 50 million years ago.

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How have elephants adapted to cope with their size and shape?

          Have you ever thought about how an enormous animal like the elephant manage its weight and size? The animal’s body has developed certain mechanisms to cope with them. If you have observed a dog or a goat, you will see that their legs are positioned at an angle. However, an elephant’s legs are like pillars. They are in an almost vertical position under their huge body. Due to this arrangement, the animal’s heavy skeleton and internal organs get a strong support.

          The skull of an elephant is special too. There are several cavities in the skull resembling a honey-comb. These hollow cavities make the skull lighter, yet strong enough to carry the weight of the trunk. Do you know that the trunk of an elephant can carry weights as heavy as 200 kilograms?

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Are elephants good runners?

          Have you seen an elephant race? In some countries such as Thailand, in order to attract tourists, activities like elephant races and elephant football matches are organized.

          Since such sports are cruel, there is a rising awareness worldwide regarding the need to handle animals in captivity with respect and consideration.

          In fact, elephants cannot run! All an elephant can manage to do is to walk. There are two gaits possible for an elephant: a walk and a faster gait, which is similar to running.

          When they are on the faster gait, they can reach speeds up to 49 km/h!

          At this speed, the elephant gives the impression that it is into a gallop, much like a horse.

          However, elephants cannot trot, jump or gallop. They are great swimmers, though!

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What are elephants hunted for?

          Elephants are magnificent wild animals. Hundreds of elephants are being hunted down every year across the globe for their tusks. Ivory from elephant tusks is more valuable than gold today. The ivory trade became a serious threat to elephants in the 1970s.

          Thousands of these animals are attached by poachers using automatic weapons, motorized vehicles and airplanes. In 1990, the concern over the decline of the elephant population led to the banning of the ivory trade world over.

          However, though the ban brought about a temporary decrease in poaching, the illegal hunting of these animals has increased dramatically in the last 10 years or so.

          This is primarily due to the rapid development of the traditionally ivory-consuming nations, particularly China.

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When do glow worms glow?

The glow worm is not really a worm at all. It is a firefly in an early stage of development called the larval stage. Most adult fireflies never eat because they did all their eating when they were larvae. They hide during the daytime among the vegetation. After dark, the female climbs up plant stems and the top of her abdomen glows. The light from a larva’s glowing body attracts tiny flies and mosquitoes for the larva to eat.

The Waitomo Caves in New Zealand house a memorable type of glow worm. Tourists entering the Glowworm Grotto in small boats see thousands of lights on the cave ceiling. The glow worms look like stars in a night sky. If you cough or use a camera flash, the lights instantly go off. But wait quietly for a few minutes and they flicker back on, until the cave-ceiling ‘sky’ is again filled with ‘stars’.

Fact File:

Woodworm, the larvae of the furniture beetle, cause lots of damage to timber both in buildings and in the wild. The damage is evident from the holes they leave behind.

 

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When do bees make honey?

Bees constantly make honey because it serves them as food. So the whole process of making honey is a way of storing up food for the bee colony. The first thing a bee does is visit flowers and drinks the nectar. Then it carries the nectar home in the honey sac. This is a bag like enlargement of the digestive tract just in front of the bee’s stomach. There is a valve that separates this section from the stomach.

The first step in the making of the honey takes place while the nectar is in the bee’s honey sac. The sugars found in the nectar undergo a chemical change. The next step is to remove a large part of the water from the nectar. This is done by evaporation, which takes place because of the heat of the hive, and by ventilation. Honey stored in the honeycombs by honeybees has so much water removed from the original nectar that it will keep almost forever! The honey is put into honeycombs to ripen, and to serve as the future food supply for the colony. Honeys differ in taste and appearance, depending on the source of the nectar.

Fact File:

Honey is removed from the hive by various methods. It may be squeezed from the comb by presses, or it may be sold in the combs cut from the hive. Most honey, however, is removed from the combs by a machine known as ‘a honey extractor’.

 

Picture Credit : Google