Send to your friends about these incredible facts about our environment
1. Babies have around Hundred more bones than adults
When a baby is born, there are about 300 bones, many of which have cartilage. This extra flexibility helps them pass through the birth canal and can also grow quickly. As we age, many bones joined, leaving 206 bones that make up the general adult bones.
2. The Eiffel Tower can be 15 cm taller during the summer
When a substance is heated, its particles move more and occupy a larger volume – this is called thermal expansion. Conversely, a drop in temperature causes the temperature to drop again. For example, the mercury content in a thermometer rises and falls with the volume of mercury as a function of ambient temperature. This effect is most pronounced in gases, but also in liquids and solids such as iron. For this reason, large structures such as bridges are constructed with expansion joints, which gives them some room to stretch and contract without causing any damage.
3. Amazon rainforest produces 20% of Earth’s oxygen
Our atmosphere consists of approximately 78% nitrogen and 21% oxygen, with a low content of various other gases. Most organisms on Earth need oxygen to survive and convert it to carbon dioxide when breathing. Fortunately, plants continue to supplement the Earth’s oxygen content through photosynthesis. During this process, carbon dioxide and water are converted to energy, releasing oxygen as a by-product. The Amazon rainforest covers an area of 5.5 million square kilometers (2.1 million square miles), recycling a large part of the Earth’s oxygen while absorbing a large amount of carbon dioxide.
4. Some metals are very reactive and will explode once they come into contact with water.
Certain metals – including potassium, sodium, lithium, strontium and barium – are highly reactive and oxidize (or lose their luster) when exposed to air. Dropping into the water can even explode! All elements strive to be chemically stable – in other words, have a complete external electronic shell. To achieve this goal, metals tend to release electrons. Alkali metals have only one electron on their outer casing, making them very sensitive to pass this unwanted passenger to another component by bonding. As a result, they easily form compounds with other elements, so they do not exist independently in nature.
5. A teaspoonful of the neutron star would weigh 6 billion tons
The neutron star is the remnant of a massive star that runs out of fuel. The dying star explodes in the supernova, and its core collapses by gravity, forming an ultra-dense neutron star. Astronomers measure an incredible number of stars or galaxies in the solar mass, one of which is equal to the mass of the sun (ie 2 x 1030 kg / 4.4 x 1030 lbs). Typical neutron stars have masses of up to three solar masses that are inserted into spheres with a radius of about ten kilometers (6.2 miles) – leading to some of the most dense matter in the known universe.
6. Chalk is made from trillions of microscopic plankton fossils
Tiny unicellular(single-celled) algae, known as coccolithophores, have survived the Earth’s ocean for 200 million years. Unlike any other marine plant, they are surrounded by tiny calccoliths. Just over 100 million years ago, the conditions were just right for the coccolithophores to accumulate in the white ooze in the thick marine floor coating. As further deposited on top, the pressure compresses the rock to form rock, forming chalk deposits such as the Dover White Cliff. Coccolithophores are just one of many prehistoric species that are immortalized in fossil form, but how do we know their age? Over time, the rock forms a horizontal layer, leaving an older rock at the bottom and a younger rock at the top. By studying the type of fossil rock, paleontologists can roughly guess its age. Based on the decay rate of radioactive elements such as carbon-14, carbon dating can more accurately estimate the age of fossils.
7. It takes 8 minutes, 19 seconds for light to travel from the Sun to the Earth
In space, light travels at a rate of 300,000 kilometers per second (186,000 miles). Even at this extremely fast speed, it takes quite a long time to cover 150 million kilometers (93 million miles) between us and the sun. Eight minutes are still rare compared to the five and a half hours that the sun’s rays reach Pluto.
8. If you take out all the blank areas in the atom, humans can adapt to the volume of the sugar cube.
The atoms that make up our world seem to be strong, but in reality the vacant space is over 99.99999%. An atom consists of a tiny dense nucleus surrounded by a cluster of electrons distributed over a correspondingly broad area. This is because in addition to particles, electrons are like waves. Electrons can only exist where the peaks and troughs of these waves are correctly added. Instead of being present at a point, the position of each electron is distributed over a series of probabilities – orbits. So they take up a lot of space.
9. Stomach acid is strong enough to dissolve stainless steel
Due to the corrosive hydrochloric acid, pH 2 to 3, your stomach will digest food. This acid can also attack your stomach wall and protect yourself by secreting an alkaline bicarbonate solution. The lining still needs to be replaced constantly and is fully updated every four days.
10. Venus is the only planet to spin clockwise
Our solar system began with a rotating cloud of dust and gas that eventually collapsed into a rotating disc with the sun at its center. Because of this common origin, all planets orbit the sun in the same direction and on roughly the same plane. They also all rotate in the same direction (or counterclockwise if viewed from above) – except Uranus and Venus. Uranus rotates on its side, while Venus rotates in the opposite direction. The most likely cause of these planets’ strange balls is the huge asteroids that knocked them back in the distant past.