Scientists have discovered that the earth's magnetic field has decayed sharply in the past 200 years. Scientists' language, at this rate, will continue to disappear in the next 1,000 years, and Earth ’s creatures will face an unprecedented cosmic ray catastrophe. It can be inferred from this:. ["Earth's magnetic field is decaying faster than it was 200 years ago.", "Humans cannot change the sharp decay of the Earth's magnetic field.", 'Radiation intensity from outer space will increase in the future.', "Earth's magnetic field blocks radiation from space."]