The week ended with a number of fascinating discoveries about the workings of the human body, including a study that found that reproduction in space was difficult due to the difficulty of living in microgravity. The study also revealed that sperm navigation, fertilization and embryo development were severely hampered in simulated microgravity, posing a serious issue for future space colonization. NASA announced ambitious plans for a moon base on the moon, including canceling a planned space station in lunar orbit and sending a nuclear-powered spacecraft to Mars. The new lunar-base plans may be partially motivated by a desire to stay ahead of China in the new space race. The war in Iran has already released a significant amount of carbon dioxide, with the biggest source of emissions being in the destruction of buildings. The discovery of viruses in the gut could help prevent blood sugar spikes and the eyes of people with synesthesia physically react as if the colors they see are real. An anomaly in Mars' mantle could trigger volcanoes to erupt, causing the planet to spin faster.