What is the biggest secret of Earth
Answers
Answer:
This past year brought tons of fascinating new information about our planet. But as scientists gaze into their crystal balls, they can see that this year is also sure to contain exciting surprises. Here we take a look at the seven most highly anticipated geophysics and Earth science expeditions, missions and meetings of 2019.
Answer:
OCEANS !

And i will explain why !
Both space and ocean exploration can boast world firsts, extreme risks, unknown challenges and mind-boggling discoveries beyond our imagination and that advances our understanding of our world and fundamentally. But somewhere we have been developing our minds to lift off from planet rather than on oceans that takes up to 70 percent of area most ,majority of this underwater world remains a mystery to humans. That’s whooping 95% of oceans are unexplored. We have the vivid images of other planets that have captured our imaginations. But we have been considering life deep below the surface can appear dark and unexciting.
Reasons why ocean will remain a mystery/secret over decades:-
Space stories are generally positive; ocean stories are generally negative. For example, “we are looking for new life on other planets” versus “we are killing life in the oceans.”
Space narratives are mission based, oceans narratives are often idea based. Like there must be creatures larger than 10 times to blue whale. We never know.
Space stories are forward-looking and often about a brighter future; ocean stories are often the reverse. Although the imagination is awakened with stories of shipwrecks, lost treasures, and mysterious sea-creatures lurking out of sight.
The goals of space exploration are visible from the Earth, so we can dream and imagine reaching into the heavens. But in the deep oceans, visibility is less than 100 feet, water pressure always about to burst equipment out and buoyancy are also the technical things that arouse while considering going more deeper.
Designing equipment that can survive at those pressures is very difficult, especially if humans will be inside. Once you have that equipment, it can only be deployed from a mother ship, which is also expensive to operate. Funding in ocean exploration will always remain issue.
we don't spend more time/money exploring the ocean because it's expensive, difficult, and uninspiring. We stare up at the stars and dream of reaching them, but few people look off the side of a boat and wish they could go down there.
All the factors clearly points vision to summary ,” what lies within the blue surface will always be a secret unknown to mankind”.
THANK YOU.