Mercury continue to bewilder NASA despite Messenger mission updates about the planet

tech.hindustantimes.com:

Mercury may not be stealing the spotlight like Mars so often does, but the planet is as intriguing as the Red Planet. The surface of Mercury is marked by mysterious hollows, which have puzzled scientists for decades. These depressions vary in size from 60 feet to over a mile across and can be up to 120 feet deep, with no known origin. The planet's lack of atmosphere means that wind and water couldn't have created these hollows, leaving scientists searching for alternative explanations. And this is despite the fact that NASA had sent its Mercury Messenger spacecraft to study the planet thoroughly.

According to NASA, Mercury is the smallest planet in our solar system and is small and rocky. Notably, it does not have an atmosphere. Also, unlike Earth's 24-hour day, a day on Mercury lasts 59 Earth days and an year is just 88 Earth days long.

The Mercury Messenger mission, launched by NASA, significantly contributed to our understanding of these hollows. It provided high-resolution images and data, revealing their unique features and characteristics.

These Mercury hollows are distinct from most other surface features and are among the youngest and brightest elements on Mercury, with an estimated age of about 100,000 years.

One theory suggests that central mounds or mountains inside impact craters, known as "peak rings," might be related to the hollow formation. These peaks could result from material thrust upward during the impact.

The intense heat, radiation, and solar wind that Mercury endures may contribute to the creation of these hollows. Certain minerals could vaporize under these extreme conditions, making the rock crumble and erode, forming the depressions.

Another hypothesis proposes that dark areas on Mercury's surface,