Enceladus might offer the greatest possibility for Earth-like life in the Saturnian system, but perhaps life takes on a different form? With a thicker atmosphere than Earth, the second-largest moon in our Solar System, Titan, was found to have liquid methane on its surface: oceans, rivers and even waterfalls! Could life make use of methane on another world the same way it makes use of water on Earth?
Pregnancy symptoms at 6 weeks. For most women, morning sickness begins between 6 and 8 weeks. You may also be exhausted and experiencing mood swings, which could be due to hormonal changes as well as the stress of wondering what lies ahead in your pregnancy. About 25 percent of women have spotting in early pregnancy.ormally you get your period about 4 weeks from the start of your last period, but if you're pregnant, the clearest sign at this point is a missed period. Many women still feel fine at 4 weeks, but others may notice sore breasts, fatigue, frequent urination, and nausea.
The symptoms of pregnancy can be different for every woman and even from pregnancy to pregnancy for one woman! But one of the most universal signs of pregnancy is a missed or delayed period. It may take a few weeks before any pregnancy symptoms start to appear.Early symptoms of pregnancy to look out for include a missed or late period, headaches, tender breasts, nausea and lower backaches.However, just because you experience these symptoms, there may be an alternative reason for them.Likewise, you may be pregnant and not experience any of these symptoms.arly symptoms of pregnancy to look out for include a missed or late period, headaches, tender breasts, nausea and lower backaches. However, just because you experience these symptoms, there may be an alternative reason for them. Likewise, you may be pregnant and not experience any of these symptoms.