There is no indication of life on Mercury. Temperatures during the day can reach 430 degrees Celsius (800 degrees Fahrenheit) while at night can dip to -180 degrees Celsius (-290 degrees Fahrenheit). Life (as we know it) is unlikely to exist on this planet.
However, there may be a form of microbial life on Mercury that we simply cannot detect with current technology. There are several factors that would prevent most forms of life from evolving on Mercury including its small size and lack of resources. The solar wind constantly blows away the atmosphere leaving the surface of Mercury exposed to space. This makes it difficult if not impossible for any life on Mercury to obtain energy from the sun.
Furthermore, much of Mercury is covered by volcanic rocks formed when molten rock bubbles up through Earth's mantle. The heat from these volcanoes could potentially destroy any organic molecules that might be present on the surface.
Still, scientists have found evidence for water on Mercury in the form of hydrated minerals such as quartz that contain elements such as hydrogen and oxygen. These elements were probably delivered to Mercury by meteorites or comet impacts.
It is possible that under the right conditions microbes could evolve on Mercury, but we will never know because they would be destroyed by the intense radiation soon after they emerged.
It's 800 degrees Fahrenheit outside. Mercury's temperatures are quite high. During the day, surface temperatures can approach 800 degrees Fahrenheit (430 degrees Celsius). Because there is no atmosphere to keep the heat in, nighttime temperatures on the planet's surface can reach minus 290 degrees Fahrenheit (minus 180 degrees Celsius).
The temperature of a body depends on many factors such as size, distance from the sun, and whether or not it has oceans. For example, Earth's moon is only 1/3 its size but it weighs almost as much. The closer an object is to the sun, the hotter it gets. And planets tend to get hotter as they evolve because their surfaces absorb solar energy and don't lose it like smaller bodies do when they tumble into space.
As far as we know, no one has ever visited Mercury. So scientists must use data from telescopes and probes to learn more about this distant planet. Data from NASA's MESSENGER spacecraft provides evidence that water may have once covered much of the planet's surface.
In addition to being very close to the sun, Mercury has the wrong kind of orbit for life as we know it. The most important feature of this planet's environment is that it is extremely hostile to life. A low pressure system called the "Mercury Magnetosphere Environment Module" (MEMs) keeps most of the planet's magnetic field inside the planet at all times.
Plants require consistent temperatures. Mercury's temperatures range from 400 degrees Celsius during the day to -200 degrees Celsius at night. Any vegetation, living or dead, on its surface would either freeze or catch fire. That's a resounding no.
Mercury is uninhabitable because it lacks an atmosphere and has temperatures ranging from 212 to 1,292 degrees Fahrenheit (100 to 700 degrees Celsius). It is also highly toxic. Humans can survive on Mercury for a few days but then begin to suffer serious health problems including neurological damage and cancer.
The Earth's nearest planet to the Sun is also one of its hottest and cruellest planets. Temperatures on Mercury can reach as high as 800 degrees Fahrenheit (425 degrees Celsius), while the coldest point on its surface is called "Cape Hoth", and lies at -180 degrees F (-280 degrees C). The solar wind blows away much of Mercury's atmosphere, leaving only a thin shell of gas around the planet. Without its atmosphere, Mercury is subject to constant bombardment by electrons and ions from the Sun, with the result that most of its surface is destroyed within about 10 million years.
However, there are some areas on Mercury where conditions may have been more favorable for life at one time.