According to foreign media reports, water bears are actually unable to kill. This kind of micro organism can withstand the pressure that will lead to the death of most other organisms. It’s a vacuum. It’s OK for this Tardigrade. Extreme pressure and temperature conditions? It’s a pediatrician for them. What about radiation? They can also solve the problem. They may even survive a lunar landing. < / P > < p > scientists have discovered a new species in a water bear on a concrete wall in Bangalore, India, which has its own super protective ability: it can survive under ultraviolet radiation by using a “fluorescent barrier”. < / P > < p > in a paper published in Biology Letters on Tuesday, a team from India said they had studied the new species, paramicrobiotus BLR. The team tested them after learning about their adaptability. First, they found that the strain survived at a bactericidal level of ultraviolet radiation – enough to kill another, less tenacious, commonly used experimental bradycardia, H. exemplaris, in 24 hours. Ultraviolet radiation can damage DNA, cause it to divide and cause cells to wilt and die. But paramicrobiotus could survive 30 days of exposure. < / P > < p > the researchers said their next discovery was “accidental.”. When studying these organisms under ultraviolet light, they noticed that the tubes filled with paramicrobiotus BLR were emitting light or “fluorescence”, while the H. exemplaris tubes were not. They speculate that this phenomenon may be due to the protection of organisms from the dangerous effects of ultraviolet radiation. < / P > < p > to test whether fluorescence is related to UV shielding, 300 microorganisms were homogenized. It’s a good science to say that they mix 300 organisms in a tissue grinder with some water. The resulting solution appears to contain chemicals that are used as UV protective coatings by microorganisms. < / P > < p > the solution was then added to a Petri dish containing microworms and H. exemplaris to determine whether it would have a protective effect. It turns out that it did. After exposure to ultraviolet radiation, which usually kills them, worms and H. exemplaris have higher survival rates. < / P > < p > as for the fluorescent compound paramicrobiotus BLR, which is used as a shield, there is no final conclusion. Maybe other proteins can protect against ultraviolet radiation – they are also present in the homogenate solution and have a protective effect. < / P > < p > the team believes that the water bear may have evolved its own fluorescent barrier to combat high levels of ultraviolet radiation in tropical southern India. Although other Tardigrada have also shown resistance to ultraviolet radiation, the protective mechanism remains unclear. Finding out which compounds play a protective role will help to develop new sunscreen products or materials to resist the harmful effects of ultraviolet rays, and even find applications in space suits in the future. After 12 years, “world class Super project” Shantou Bay Tunnel ushers in a historic breakthrough today