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The Purple Earth Hypothesis (PEH) is an astrobiological hypothesis, first proposed by molecular biologist Shiladitya DasSarma in 2007, [ 1] that the earliest photosynthetic life forms of Early Earth were based on the simpler molecule retinal rather than the more complex porphyrin -based chlorophyll, making the surface biosphere appear purplish ...
Because the Earth was molten when it was formed, almost all of the gold present in the early Earth probably sank into the planetary core. Therefore, as hypothesized in one model, most of the gold in the Earth's crust and mantle is thought to have been delivered to Earth by asteroid impacts during the Late Heavy Bombardment , about 4 billion ...
Lydia of Thyatira and Philippi. The name, "Lydia", meaning "the Lydian woman", by which she was known indicates that she was from Lydia in Asia Minor. Though she is commonly known as "St. Lydia" or even more simply "The Woman of Purple," Lydia is given other titles: "of Thyatira ," "Purpuraria," and "of Philippi ('Philippisia' in Greek)."
Read below for the full text of Lincoln's address: Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition ...
Purple is one of the least used colors in vexillology and heraldry. Currently, the color appears in only four national flags: that of Dominica, Spain, El Salvador, and Nicaragua, and one co-official national flag, the Wiphala (co-official national flag of Bolivia ). However, it is also present in the flags of several administrative subdivisions ...
The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species indicate that they have diverged through the ...
Text and miniatures. Each gospel is preceded by the following: two pages summarizing the gospel, two pages imitating textiles, four pages of narrative scenes laid out in three registers per page, a full-page evangelist portrait, two pages of decorative text, before a full-page initial, which begins the actual text.
July–September. August 7 – American Baptist minister William Miller preaches his first sermon on the Second Advent of Christ in Dresden, New York, launching the Advent Movement in the United States. August 21 – Outbreak of Nat Turner's Rebellion in Southampton County, Virginia. Approximately 55 whites are stabbed, shot and clubbed to death.