One Planet : Seven Worlds

Sir David Attenborough is an icon in the field of wildlife world. He has explored and brought his rendezvous with nature to common man through his extraordinary documentaries. Now he has brought this documentary “One Planet Seven Worlds” which will be on BBC Earth.

Our Earth has 70% water in the form of oceans and 30% landmass. In the beginning, whole landmass was one continuous mass. At that time, lot was happening inside the Earth. Lots of tectonic activity was occurring and lava as it was cooling down was also spewing out.

Tectonic plates were colliding and pushing against one another. Slowly the single landmass began breaking into fragments. Ultimately it broke into 7 stable land masses separated from each other by the water. These are the seven continents. Asia, Africa, Europe, South America, North America, Oceania and Antarctica.

Each continent has unique climate and geology which has given rise to stunning individual bio-diversities on each continent. That is why, Attenborough calls them Seven Worlds. The series will feature remarkable, new behaviour from different continents. From the extremely hot African plains to frozen waters of Antarctica.

He will also touch how we are now destroying the habitat of the wildlife. Due to this, some species are faced with extinction. Forests are being cut, extreme fishing and pollution is threatening our own and the wildlife existence.

Trailer of One Planet Seven Worlds

Introduction features a very soulful song “Out There” by Australian born singer Sia.

“I pray
Yeah, I’m hoping that if I pray
Maybe you’ll talk back
‘Cause I pray for some faith, some faith today

This walk feels longer in the dark tonight
No hand to hold, no hand in sight
I pour my heart out to the blackest sky
Oh, spirit, can you hear my soul’s cry?

Can you hear my call? Can I have a sign?
‘Cause I am losing hope
Yeah, on my darkest night

This walk feels longer in the dark tonight
No hand to hold, no hand in sight
I pour my heart out to the blackest sky
Oh, spirit, can you hear my soul’s cry?

No, I don’t wanna walk alone, I want to believe
‘Cause I am losing hope
As love will speak to me
Can you hear my call? Can I have a sign?
‘Cause I am losing hope
Yeah, on my darkest night

I got a feeling you’re out there
I got a feeling you’re out there”

Video on Youtube Link

Sia Kate Isobelle Furler

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Earth’s ICE RECORDS 

Earth’s ICE RECORDSIce cores preserve climate history of million of years. Most of the ice cores are taken from the ice deposited in Antarctica and Greenland. Some interesting facts…

Ice cores have been preserved in US National Ice Core Library (NICL) in Denver Colorado.

  1. Oldest ice core record kept there is 420000 years old.
  2. In the library are ice cores collected and preserved from a single hole 3.6 kilometres.
  3. Total length of all the ice core samples preserved in the NICL is 20 kilometres.

Dust and chemicals trapped inside the ice samples can delineate the climatic conditions prevalent in the different times in the past. Climatic Histories upto 850000 years has been recreated.
How the age is determined??
Water like any other chemical contains normal oxygen 16 (O16)atom as well as a very small fraction of  oxygen 18 (O18)atoms. Water evaporation is a function of temperature. At higher temperatures O18 water evaporates more along with O16 water which means when these vapors condense will be richer in O18 . From the ratios of hydrogen
O18 and O16, temperature can be deduced.
Similarly trapped CO2 inside the cores gives the CO2 levels at different times in the past.