火星上的石头花
2022年3月9日 A Flower-Shaped Rock on Mars Image Credit: NASA, JPL-Caltech, MSSS Explanation: It is one of the more unusual rocks yet found on Mars. Smaller than a penny, the rock has several appendages that make it look, to some, like a flower. Although it would be a major discovery if the rock was truly a fossilized ancient Martian flower, there are less spect...