Today I Learn

17 October 2025 07:00

What Is the Hubble Space Telescope?

The Hubble Space Telescope is a large telescope in space. NASA launched Hubble in 1990. Hubble is as long as a large school bus. It weighs as much as two adult elephants. Hubble travels around Earth at about 5 miles per second.

Hubble faces toward space. It takes pictures of planets, stars and galaxies. Hubble has seen stars being born. Hubble has seen stars die. It has seen galaxies that are trillions of miles away. Hubble also has seen comet pieces crash into the gases above Jupiter.

Scientists have learned a lot about space from Hubble pictures. The pictures are beautiful to look at too.

Today I Learn

14 October 2025 17:46

What is 'Twilight Zone' of oceans?

Twilight zone in oceans is the part at the depth of 200 to 1000 metres. These depths are given such a name because water at these depths receive less sunlight. A study by Cardiff University has revealed that global warming is adversely affecting life in the twilight zone of oceans.

As one goes deeper in ocean, organisms obtain nutrition via different modes. One of them is the 'marine snow'. Marine snow is simply food and nutrient particles sinking deeper in water after they fall into it from air.

Today I Learn

02 October 2025 11:06

Can a shark swim backwards?

Unlike fish, sharks cannot stop suddenly or swim backwards. A shark's pectoral fins cannot bend upwards like a fish, limiting its swimming ability to forward motion. If a shark needs to move backwards, it uses gravity to fall, not swim backwards.

Today I Learn

13 September 2025 06:07

How long is the earth's circumference?

The circumference of Earth at the equator is about 24,902 miles (40,075 km), but from pole-to-pole — the meridional circumference — Earth is only 24,860 miles (40,008 km) around. This shape, caused by the flattening at the poles, is called an oblate spheroid.

Today I Learn

06 September 2025 02:46

Does Eating carrots can turn your skin orange?

A condition called carotenemia, this can happen if you eat three large carrots or more every day for a long period of time. This is because the carrots give the body too much beta-carotene, which causes the changing color of your skin.

Today I Learn

01 September 2025 16:47

How does a bird pee?

Birds convert nitrogen to uric acid, this is metabolically more costly but saves water and weight, as it is less toxic and doesn't need to be diluted so much. Birds therefore don't have a urethra, and don't pee – all waste leaves via the anus.

Today I Learn

29 August 2025 02:46

🔵Facts About Kangaroos

🔸Kangaroos move by hopping, they swim and they can’t hop backwards!

🔸Kangaroos are the only large animals that move by hopping.

🔸If you lift a kangaroo’s tail off the ground it can’t hop.

🔸A male kangaroo is called a boomer, a female is called a flyer and a baby kangaroo is a joey.

🔸A group of kangaroos is known as a mob.

🔸There are over 47 different species of Kangaroo, with the eastern gray kangaroo, being the most commonly known species.

🔸They use their tails for balance whilst jumping.

Today I Learn

22 August 2025 06:09

Which metal is liquid at standard room temperature?


Mercury is the only metal that is liquid at standard room temperature and pressure. That's because the electrons that spin around the nucleus of a mercury atom have just weak links or bonds with other mercury atoms at room temperature, keeping the metal in a liquid state.

Today I Learn

10 August 2025 06:06

🖌Australia may be surrounded by water, but it doesn't have the World's Longest Coastline.

Being its own continent and completely surrounded by water, you’d think Australia would easily have the honor of being the country with the longest coastline. However, that title goes to Canada. Canada has 152,100 miles of coastline, compared to Australia’s measly 16,000 miles. In fact, Australia ranks seventh on the list of the world’s longest coastlines, coming in behind Indonesia, Greenland, Russia, Philippines, and Japan.

Today I Learn

22 July 2025 14:40

What is the wettest inhabited place in the world?

Mawsynram, a village on the Khasi Hills, Meghalaya, receives the highest recorded average rainfall in the world. Cherrapunji, also a part of Meghalaya, holds the record for the most rainfall in the calendar year of 1861.

Today I Learn

19 July 2025 10:28

🖌Facts about Taj Mahal.


Location: Agra, India

Built:    1632–1653

Build By: Shah Jahan

Remarks:
 It is a white marble mausoleum located in Agra on the southern bank of the Yamuna River. It was built by Mughal emperor Shah Jahan in memory of his third wife, Mumtaz Mahal. The construction of the Taj Mahal was entrusted to a board of architects under imperial supervision, including Abd ul-Karim Ma'mur Khan, Makramat Khan, and Ustad Ahmad Lahauri. Lahauri is generally considered to be the principal designer.

Today I Learn

04 July 2025 05:38

Which countries are completely surrounded by another country?

Lesotho, San Marino, and Vatican City are known to be the only countries that are completely surrounded by another country. Lesotho is encircled by South Africa, Vatican City and San Marino, both are encompassed by Italy.

Today I Learn

02 July 2025 16:47

Where is most of the world's fresh water present?

Antarctica, at 14 million square kilometers (about 5,400,000 square miles), the ice sheet in Antarctica is the largest solid ice mass on the planet. The enormous frozen structure contains about 90 percent of all the fresh water on Earth.

Today I Learn

17 June 2025 04:23

What are the highest and deepest point in the world?

Highest point Mount Everest (at approximately 8,850 meters) and Lowest point Mariana Trench ( at 11,034 meters deep below ocean).  If you placed Mount Everest at the bottom of the Mariana Trench, the peak would still be 2,133 meters below sea level.

Today I Learn

11 June 2025 02:45

What is the only vegetable that is never frozen?

The only vegetable or fruit never sold frozen, canned, processed, cooked, or in any form other than fresh is.... Lettuce.

Today I Learn

16 October 2025 06:49

Will the coronavirus ever go away?

No one knows for sure. Scientists think the virus that causes Covid-19 may be with us for decades or longer, but that doesn't mean it will keep posing the same threat.

The virus emerged in late 2019 and it's difficult to predict how it will behave over the long term. But many experts believe it's likely the disease will eventually ease from a crisis to a nuisance like the common cold.

That would happen as people build up immunity over time, either through infection or vaccination. Other viruses have followed a similar path.

The 1918 flu pandemic could also offer clues about the course of Covid-19.

Today I Learn

08 October 2025 04:27

How long do dogs live on average?

Nearly 40% of small breed dogs live longer than 10 years, but only 13% of giant breed dogs live that long. The average 50-pound dog will live 10 to 12 years. But giant breeds such as great Danes or deerhounds are elderly at 6 to 8 years.

Today I Learn

28 September 2025 05:12

Why do flamingos stand on one leg?

Flamingos often stand on one leg, the other leg tucked beneath the body. The reason for this behaviour is not fully understood. Recent research indicates that standing on one leg may allow the birds to conserve more body heat, given that they spend a significant amount of time wading in cold water.

Today I Learn

09 September 2025 05:52

Can cockroach live without head?

A cockroach can live for a week without its head. Due to their open circulatory system, and the fact that they breathe through little holes in each of their body segments, they are not dependent on the mouth or head to breathe. The roach only dies because without a mouth, it can't drink water and dies of thirst.

Today I Learn

02 September 2025 04:12

Does crying help relieve physical pain?


Research has found that in addition to being self-soothing, shedding emotional tears releases oxytocin and endorphins. These chemicals make people feel good and may also ease both physical and emotional pain. In this way, crying can help reduce pain and promote a sense of well-being.

Today I Learn

01 September 2025 07:02

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Today I Learn

23 August 2025 02:49

Can snakes predict earthquake?

Snakes can help predict earthquakes. They can sense a coming earthquake from 75 miles away (121 km), up to five days before it happens.

Today I Learn

17 August 2025 08:31

🖌This is how an egg looks like a crazy jellyfish underwater.



A cracked egg on land might make a big mess, but 18 metres (60 feet) below the surface of the ocean, the pressure on the egg is 2.8 times atmospheric pressure, and it holds it all together like an invisible egg shell.

Today I Learn

01 August 2025 01:39

What are jellyfish made of?


Only about five percent of the body of a jellyfish is solid matter; the rest is water(95% water). Lacking brains, blood, or even hearts, jellyfish are pretty simple critters. They are composed of three layers: an outer layer, called the epidermis; a middle layer made of a thick, elastic, jelly-like substance called mesoglea; and an inner layer, called the gastrodermis. An elementary nervous system, or nerve net, allows jellyfish to smell, detect light, and respond to other stimuli. The simple digestive cavity of a jellyfish acts as both its stomach and intestine, with one opening for both the mouth and the anus.

Today I Learn

21 July 2025 15:53

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Today I Learn

08 July 2025 04:25

Facts about Great Pyramid of Giza.


Location: El Giza, Egypt

Built: 2550 BC

Build By: Pharaoh Khufu

Remarks:
It one of the seven wonders of the ancient world. The largest pyramid ever built, it incorporates about 2.3 million stone blocks, weighing an average of 2.5 to 15 tons each. The pyramid has three burial chambers. The four faces of the pyramid are slightly concave, the only pyramid to have been built this way.

Today I Learn

03 July 2025 11:48

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Today I Learn

23 June 2025 04:16

What is the name of our planet's largest hot desert?


The Sahara desert in Africa is the largest desert in the world. In fact, Sahara is only the largest HOT desert as the Arctic desert and the Antarctic desert are bigger, but are usually referred to as polar deserts. 

Today I Learn

15 June 2025 05:42

Which color has the highest frequency?

Out of the 7 colours of the rainbow, violet has the highest frequency and the smallest wavelength.

Today I Learn

27 May 2025 07:21

What is the dew point?

Dew point temperature is defined as the temperature to which the air would have to cool (at constant pressure and constant water vapor content) in order to reach saturation. A state of saturation exists when the air is holding the maximum amount of water vapor possible at the existing temperature and pressure.