claim: A South African paper has found a 21 year cycle synchronous with the solar cycle (Alexander 2007).
evidences.evidence_id: Ice age:182
evidences.article: Ice age
evidences.evidence: The Milankovitch cycles are a set of cyclic variations in characteristics of the Earth's orbit around the Sun.
evidences.votes: SUPPORTS NOT_ENOUGH_INFO
evidences.evidence_id: Leap year:0
evidences.article: Leap year
evidences.evidence: A leap year (also known as an intercalary year or bissextile year) is a calendar year containing an additional day (or, in the case of lunisolar calendars, a month) added to keep the calendar year synchronized with the astronomical or seasonal year.
evidences.votes: SUPPORTS NOT_ENOUGH_INFO
evidences.evidence_id: Leap year:109
evidences.article: Leap year
evidences.evidence: The Bahá'í calendar is a solar calendar composed of 19 months of 19 days each (361 days).
evidences.votes: NOT_ENOUGH_INFO NOT_ENOUGH_INFO
evidences.evidence_id: Little Ice Age:162
evidences.article: Little Ice Age
evidences.evidence: Orbital forcing from cycles in the earth's orbit around the sun has, for the past 2,000 years, caused a long-term northern hemisphere cooling trend that continued through the Middle Ages and the Little Ice Age.
evidences.votes: SUPPORTS NOT_ENOUGH_INFO
evidences.evidence_id: Moon:1417
evidences.article: Moon
evidences.evidence: One comprises what we have called "Saros Cycle Texts", which give the months of eclipse possibilities arranged in consistent cycles of 223 months (or 18 years).
evidences.votes: SUPPORTS NOT_ENOUGH_INFO