According to the authors of a 2018 article, abdominal migraines usually affect children between the ages of 3 and 10 years old. Home / About. Time and Date Duration – Calculate duration, with both date and time included Date Calculator – Add or subtract days, months, years Key Takeaways For all … Fusion occurs when two atoms slam together to form a heavier atom, like when two hydrogen atoms fuse to form one helium atom. About Us. The difference is that