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.
Early Pregnancy Symptoms. Many women do not encounter any early pregnancy symptoms. A missed or late period are one of the first signs these women experience. A period that is a week late can be a serious surprise. Most of the earliest symptoms are very vague. It is easy to confuse a mild stomach bug or pre-menstrual cramping as signs of pregnancy. If you believe that you are pregnant, see a doctor for a blood test to officially confirm it.