Attention deficit hyperactivity disorder (ADHD) should be diagnosed and treated in children as young as age 4, according to new guidelines from the American Academy of Pediatrics. Skip to main content
ephemeris. 1  a table showing the positions of a heavenly body on a number of dates in a regular sequence. 2  an astronomical almanac containing such tables. 3  Archaic. an almanac or calendar.
Plants also need to save valuable water. Plants known as ephemerals have very short lives. They can sprout from seed, grow, produce flowers, and make seeds for the next generation in only 2-4 weeks! Their rapid growth takes place during the desert's short rainy season which may last only a few days to a few weeks. Seeds from these plants have special waterproof coverings that keep them from drying out. The seeds will simply wait until the next year's rainy season to sprout and start the cycle over again.