folate (fÅËÂ·lÄt), n a B vitamin that is present in leafy green vegetables, dry peas and beans, and fortified breads and cereals. Folate deficiency may increase the risk of certain cancers, Alzheimer's disease, and certain birth defects, such as neural tube defects.
World's oldest twins are 102-year-old Scottish sisters, says Guinness World Records. Twins Evelyn (left) and Edith (right) celebrate their 102 birthday. Guinness World Records has declared the pair from Scotland the world's oldest twins.
DNA Twin Test. Identical Twins & Fraternal Twins. There are two different types of twins: Identical twins, and fraternal twins. When twins are the same sex, it is often impossible to tell for certain whether they are identical twins or fraternal twins. DNA twin zygosity testing can conclusively determine whether twins are identical or fraternal.