First, although lava at 2,000 degrees F can melt many materials in our trash – including food scraps, paper, plastics, glass and some metals – it's not hot enough to melt many other common materials, including steel, nickel and iron.
Above a certain temperature, these bonds break – and even the coldest lava on the planet would be far too hot for DNA or RNA to remain intact. So no, you almost certainly won't find anything alive in molten rock, even extremophiles.
The short answer is that while lava is hot, it's not hot enough to melt the rocks on the side of or surrounding the volcano. Most rocks have melting points higher than 700℃.
Lava can melt any material, including rubber, tanks, cars, trees, and grasses, with melting points below 2,190° F. However, if it cannot completely melt these materials, it can set them on fire and ultimately turn them to ashes.
Tardigrades are among the most resilient animals known, with individual species able to survive extreme conditions – such as exposure to extreme temperatures, extreme pressures (both high and low), air deprivation, radiation, dehydration, and starvation – that would quickly kill most other known forms of life.
No, lava would not melt a person. Although temperatures in and around an active volcano can reach up to 2,200°F (1,200°C), lava itself (once it has been released from the volcano) is typically between 1,300°F (700°C) and 2,200°F (1,200°C) and likely would not be hot enough to melt a person.
Less dense things rise above more dense things, so if you attempt to replicate the actions of the authorities in a particularly egregious 1997 Hollywood movie and build a wall of concrete around a massive lava flow, it won't stop it – the blocks will float on top of it, heat up and begin to melt.
Is lava hotter than the Sun? While lava is still intensely hot, it is not hotter than the Sun. On average, lava can range between 1,300 to 2,200 degrees Fahrenheit, depending on its location. It's safe to say the sun at all parts is much hotter than lava.
First, although lava at 2,000 degrees F can melt many materials in our trash – including food scraps, paper, plastics, glass and some metals – it's not hot enough to melt many other common materials, including steel, nickel and iron.
Diamond is the hardest known material to date, with a Vickers hardness in the range of 70–150 GPa. Diamond demonstrates both high thermal conductivity and electrically insulating properties, and much attention has been put into finding practical applications of this material.
It is important to note that the skeleton does not 'turn to ash' upon burning. Even within modern crematoria, which burn efficiently and at high temperatures, the skeleton will survive.
Actual lava is red-orange in color, given its temperature. Truly-blue lava would require temperatures of at least 6,000 °C (10,830 °F), which is much higher than any lava can naturally achieve on the surface of the Earth.
Lava won't kill you if it briefly touches you. You would get a nasty burn, but unless you fell in and couldn't get out, you wouldn't die. With prolonged contact, the amount of lava "coverage" and the length of time it was in contact with your skin would be important factors in how severe your injuries would be!
When lava meets ice, the resulting mess can cause flooding, destroy valuable resources and even produce explosions. The research found that lava didn't always just melt through the ice, and flow under the surface.
Water has been found to be the most practical means to achieve lava cooling. Water absorbs heat from the lava; even more so, if it heats up to the boiling point and changes to steam.
Lava is also referred to as liquid magma. The temperature of magma is slightly hotter and ranges from 1300 to 2400 degrees Fahrenheit. The temperature of lava is slightly colder and ranges between 1300-2200 degrees Fahrenheit.
You would never fall into a lava lake the way you would a swimming pool, the molten rock is much more dense, so you would simply land on it, sink a little, and be burned."
The colour of lavas can be associated with the temperature reached at the surface: dark red at low temperatures (475°C), orange at 900°C and white at extremely high temperature (>1150°C) (Kilburn, 2000).
Most lava is very hot—about 2,000 degrees Fahrenheit. At those temperatures, a human would probably burst into flames and either get extremely serious burns or die. One person has survived falling into much cooler lava in Tanzania in 2007, according to field reports from the Smithsonian.
The answer—quite surprisingly—is yes, they can! Not only do sharks survive in underwater volcanoes, but it seems that they thrive there. In fact, Kavachi's entire marine community appears to be accustomed to its acidic, blistering hot water and frequent eruptions.
While your lungs would almost undoubtedly be irrevocably charred from the hot air above the lava (assuming relatively static air conditions over the lava), it takes about 80 seconds for the average human to fall unconscious from lack of oxygen, and I highly doubt your body will last that long.
Despite their reputation, tardigrades aren't entirely indestructible. They cannot survive the trip through the human digestive tract since our stomach acid disintegrates the flesh of the tardigrade without much trouble, so eating one wouldn't do any harm.