Many great mysteries have been and have not been answered in 2016

We know why the giant gorillas were extinct in the past, or "Hobbit" has been proven to be far different from humans. However, there are still unresolved mysteries, such as "Wow!" or the disappearance of the MH370.

Answer: The rings in Nazca

The Nazca region in Peru is famous for its huge array of drawings on the ground. They form shapes, familiar animals, like monkeys in the picture above. Research published last year shows that they are used as pilgrimages to ancient temples.

In 2016, using high-resolution satellite images, archaeologists suggested that a series of lines, known as puquios , acted as a hydraulic system to extract water from the aquifer.

"It is clear that the puquio system must have grown a lot better than it looks today," Rosa Lasaponarac from the Institute of Environmental Analysis Methodology in Italy told BBC News. "Exploiting an infinite water source throughout the year thanks to the puquio system that contributes to this place - the valleys belong to one of the most arid places in the world - a developed agriculture.

Unanswered: Malaysia Airlines flight mh370 is missing

On March 8, 2014, Flight 370 left Kuala Lumpur International Airport in Malaysia to reach Beijing. The last contact from the plane is at 1:19 am local time, less than 1 hour before takeoff. The plane and 227 passengers and 15 crew members disappeared completely afterwards.

After two years of searching and spending $ 150 million, the ship was finally looking for traces of MH370 and it might be the only time left, NBC News said. The search ship Fugro Equator will complete its mission early next year.

The families of the ill-fated victims are calling for an expansion of the search, but with so little information and new evidence found on one of Earth's harshest waters, the authorities have no intention of do.

Answer: Déjà Vu

Scientists have answered why we sometimes feel that we are repeating the past.

According to a research team led by Akira O'Connor of the University of St Andrews, England, this feeling is created because the brain is trying to reconfirm memories. In fact, the team concluded that those who do not experience this feeling often experience memory problems.

They recreated Déjà Vu in the laboratory by activating a false memory. They let participants study a series of related words - bed, pillow, evening, dream - but they would give up the word "sleep".

When asked, participants do not necessarily remember words, but those words will seem very familiar. During the testing period, researchers used fMRI to scan brain activity and found that the brain region involved in making decisions lighted up.

Unanswered: DB Cooper

Since 1971, the FBI has tracked the infamous robber DB Cooper, but last summer they announced that the case was closed to shift manpower to "other investigation priorities".

"In the 45 years of the NORJAK investigation, the FBI has fully considered reliable clues, combined with other departments to conduct searches, collect possible evidence and question all witnesses. identified, " quoted an FBI spokesman. "Over the years, the FBI has applied a lot of new and advanced investigative techniques, as well as numerous tests in the FBI laboratory."

Also according to the statement, "to solve a case, the FBI must somehow prove the offense goes beyond the boundaries of suspected suspicion and unfortunately, without any hint or application of technology. any new investigation brings back the necessary evidence ".

The evidence regarding the Cooper case will be stored and if there is new information or evidence, namely the robber's parachute or the appropriated money, the FBI will reopen the case.

Answered : "Hobbits" are not people

About 15,000 years ago, there was a small race living on Flores Island, Indonesia. After being found for the first time in 2003, an argument broke out to see if these individuals were a new species or simply a variant compared to modern, deformed people due to illness.

The controversy came to fruition this year when scientists - based on skull analysis - confirmed that this is Homo floresiensis , a far cry from humans.

Homo floresiensis is about 1m tall, weighs about 25kg. Flores Island is home to extinct dwarf animals, such as the Stegodons.

Unanswered: Stingrays die mass

At the end of last year, more than 70 stingrays died in the Mekong River in Thailand. Scientists and wildlife conservation scientists have yet to find the cause of this, possibly due to an increase in acidity in the water, or a source of contaminated water.

Himantura polylepis stingrays can be up to 2.4 meters long, 1.8 meters wide and weigh nearly 500kg. This species is facing the risk of extinction due to habitat loss and discharge from factories as well as riverside construction sites.

Answer: What killed Kong?

About 100,000 years ago, the largest-known gorilla - large near the King-Kong in real life - lived in forests in southern China, India, and Vietnam. Just like the name, Gigantopithecus is 3m tall and weighs 540kg.

So what can take down a great gorilla, existed about 900 million years ago like that? According to a study published in Quaternary International, the answer is climate change.

Once climate change eradicates fruit trees, this gorilla - which only eats plants - cannot adapt to the forests turning into savanna. They found a source of food, but the supply was too small so they could hardly survive.

Unanswered: "Wow" signal of aliens

It will take at least another year before astronauts answer the signal discovered by the Big Ear Radio observatory in 1977, creating a message "Wow!" in the printout of data from the computer.

Since the night of August 15, 1977, scientists have wondered whether the detected signal is evidence of extraterrestrial life from one of the three planets named Chi Sagittarii in the Sagittarius constellation, or simply due to the interference of a comet across.

Two comets have been discovered in the past 10 years, not considered a source of search in 1977, as they fly over Chii Sagittarii. The first star will appear in 2017 and the other star will appear next year. Antonio Paris from St. Petersburg University Petersburg hopes to explain some of this mystery by building a radio antenna to track the phenomenon, or even decode it.