Refreshing Quotations on Nature

Those who contemplate the beauty of the earth find reserves of strength that will endure as long as life lasts. There is something infinitely healing in the repeated refrains of nature — the assurance that dawn comes after night, and spring after winter.

Rachel Carson, Silent Spring

I felt my lungs inflate with the onrush of scenery—air, mountains, trees, people. I thought, “This is what it is to be happy.

Sylvia Path, The Bell Jar

I wonder if the snow loves the trees and fields, that it kisses them so gently? And then it covers them up snug, you know, with a white quilt; and perhaps it says, “Go to sleep, darlings, till the summer comes again.

Lewis Carroll, Alice’s Adventures in Wonderland

We need the tonic of wildness…At the same time that we are earnest to explore and learn all things, we require that all things be mysterious and unexplorable, that land and sea be indefinitely wild, unsurveyed and unfathomed by us because unfathomable. We can never have enough of nature.

Henry David Thoreau, Walden: Or, Life in the Woods

Not just beautiful, though–the stars are like the trees in the forest, alive and breathing. And they’re watching me.

Haruki Murakami

Is the spring coming?” he said. “What is it like?”…
“It is the sun shining on the rain and the rain falling on the sunshine…

Frances Hodgson Burnett, The Secret Garden

Climb the mountains and get their good tidings. Nature’s peace will flow into you as sunshine flows into trees. The winds will blow their own freshness into you, and the storms their energy, while cares will drop away from you like the leaves of Autumn.

John Muir, The Mountains of California

Rest is not idleness, and to lie sometimes on the grass under trees on a summer’s day, listening to the murmur of the water, or watching the clouds float across the sky, is by no means a waste of time.

John Lubbock, The Use of Life

Wild roses are fairest, and nature a better gardener than art.

Louisa May Alcott, A Long Fatal Love Chase

Autumn leaves don’t fall, they fly. They take their time and wander on this their only chance to soar.

Delia Owens, Where the Crawdads Sing

Trees’re always a relief, after people.

David Mitchell, Black Swan Green

I hope you liked these quotes.

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How Earth became a Blue Planet?

The fact that about three fourth of Earth is covered with water in the form of oceans, seas, rivers, lakes etc. is known by all of us.

But, how these water bodies were formed and what is the source of this much amount of water on Earth is the major topic of controversies and debate for the scientists.

The oceans are significant domains of the Earth because the first life was originated in the oceans and it protected the first organic molecules and organisms from the meteoritic bombardment and UV radiations.

Various theories have been proposed about the particular topic but, none of those is universally accepted till now.

The major theories can be studied as follows:

1. Cometary Theory
The present volume of the water of the oceans is 1.4×10²¹ kg. The theory stated that during the earlier days of the formation of Earth, it was hit by several comets. These comets were full of water and about 2.2- 8.5×10²¹ kg of water was supplied to the Earth. But, it was not possible that the comets actually hit the planet during its formation period so, this theory is not accepted.

2. Terrestrial Water Inventory
This states that the source of water and other volatile substances (including water and carbon dioxide) is the interior of Earth. During the time when the planet was formed, the substances were degassed outside.

3. Volcanism
This states that the major source of volatiles is the volcanic eruption which released a large amount of water and carbon dioxide into atmosphere.

4. Asteroids
About 90% of the total water on Earth’s surface was brought to the Earth through asteroids which entered inside. This is proved by the fact that deuterium to hydrogen ratio of oceanic water is close to that of asteroids. But, the ratio was found to be slightly different in deeper regions of Earth indicating that there are other sources of water also, besides the asteroids.

5. Solar nebula
It is the clouds of gas and dust left after the formation of sun. Scientist Jun Wu suggests that one or two water molecules out of the 100 water molecules on Earth were formed from solar nebula.
When the Earth was formed, its upper surface comprised of a large amount of magma. The atmosphere was initially composed of the hydrogen and noble gases brought by the solar nebula.

Hope you found the post knowledgeable.

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Glowing Beings

Have you ever wondered🤔 why fireflies flicker?
Why does water surface glows in dark?
The reason is phenomenon of bioluminescence. Have a read:

Bioluminescence is the process through which light is produced and emitted by living organisms.

It is generally found in the aquatic marine organisms living in water columns, under deep sea, among corals etc. It also occurs in the fireflies.

Scientists believe that bioluminescence could be the most common way of communication on the planet because the phenomenon mostly occurs in deep sea, which occupies the major portion of planet!!

They have also discovered that the phenomenon of bioluminescence has evolved around 40 times in the course of evolution while rayfinned fishes alone have evolved about 27 times.

Occurence

Lanternfish have a light emitting organ, photophores present at their belly, ventral surface and a light organ at nose acts as a headlight.

A biological clock controls bioluminescence in the dinoflagellate, Pyrocystis fusiformis i.e. after the sunset chemicals responsible for light emission are synthesized.

The phenomenon is known to be existing in 1,500 species of fish, bacteria, algae, sharks, sea stars, jelly fishes and crustaceans.

Some dinoflagellates form blooms on the surface of ocean giving reddish-brown colour to them. But, at night, they sparkle with the waves of ocean. Some of them are toxic to living system thus, given the name harmful algal blooms (HBA). When they are consumed by aquatic organisms, they fall ill or may die too.

Reason

The way bioluminescent organisms flicker is due to a chemical reaction occurring in their abdomen, a molecule called luciferin which reacts with oxygen to produce light. In some organisms, an enzyme called luciferase catalyzes this reaction.

Different forms of luceferin is present in different species.

Sometimes luciferin occurs in the form of photo-protein, which immediately lights up an organism in presence of calcium ions.

As bioluminescent organisms live deep under the ocean, lights of only smaller wavelength like, blue and green wavelengths of light reach our eyes when we observe them.

Importance

1. Protection from Predators- Squid release bioluminescent fluid to confuse predators.

2. Attraction of Mates- Some worms and crustaceans use bioluminescence to attract their mates.

3. Feeding- Some fishes create a lighted lure near their mouth to attract the prey.

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