Mast (botany) Mast seeding is defined as the highly variable production of fruit by a population. These intermittent pulses of food resources drive ecosystem-level functions and forest dynamics. The difference between a mast seeding year and a non-mast seeding year can be thousands of acorns, hickory nuts, beech nuts, etc. Mast seeding dominantly occurs in wind-pollinated tree species, but has also been observed in grasses and Dipterocarps. Masting, in the strict sense of the term, occurs only in monocarpic (or semelparous) species, whose members reproduce only once during their lifetime, then die. Hypothesis for the evolution of mast seeding can broadly be
Warsaw radio mast slowly deteriorating. Eldorado do Sul RBS Radio Mast, a mast radiator in Eldorado do Sul, Brazil, is a nearly perfect replica of Warsaw Radio Mast with 35.5% of its height. Warsaw radio mast The Warsaw Radio Mast was the world's tallest structure from 1974 until its collapse on 8 August 1991. It was the second tallest structure ever built, being surpassed as tallest by the Burj Khalifa, completed in 2010. The mast, which was designed by Jan Polak, was tall. Its construction, started in July 1970, was completed on 18 May 1974, and its transmitter entered regular service on 22