Ancient Aliens - Evidence of Aliens in History ...

View archeological evidence supporting alien intervention on Earth, Alien evidence in petroglyphs, heiroglyphics and the oldest Sumerian writings. Detailed Indian accounts of Vimanas as well as Ancient Alien tales of the Sky People from the Hopi Indians.

Helium-3 - Wikipedia

Helium-3 (3 He, see also helion) is a light, non-radioactive isotope of helium with two protons and one neutron (common helium having two protons and two neutrons). Its hypothetical existence was first proposed in 1934 by the Australian nuclear physicist Mark Oliphant while he was working at the University of Cambridge Cavendish Laboratory .

extraterrestrial helium boundary - unifai.eu

Absence of extraterrestrial ^3He in Permian–Triassic … Helium concentration and isotopic composition were measured in a suite of samples across the Permian–Triassic boundary at Opal Creek, Canada, to determine whether ...

Fullerenes: An extraterrestrial carbon carrier phase for ...

2000-03-28· Terrestrial discoveries (7–10) have been limited to the detection of mostly C 60 and C 70 whereas extraterrestrial evidence is based on trace findings of C 60 and a single mass spectrum of a high mass carbon envelope from the Allende meteorite .

Extraterrestrial Helium in Seafloor Sediments ...

Helium isotope systematics uniquely identify the extraterrestrial component, which is apparently hosted within magnetite and silicate grains. In some sediments 3 He is completely derived from this source, in others the extraterrestrial fraction can be computed from the measured 3 He/ 4 He ratio.

Evidence for an extraterrestrial impact 12,900 years ago ...

In this paper, we provide evidence for an extraterrestrial (ET) impact event at ≅12.9 ka, which we hypothesize caused abrupt environmental changes that contributed to YD cooling, major ecological reorganization, broad-scale extinctions, and rapid human behavioral shifts at the end of the Clovis Period.

Extraterrestrial accretion from the GISP2 ice core

Extraterrestrial accretion from the GISP2 ice core D ANIEL B. K ARNER, 1, * J ONATHAN L EVINE, 1 R ICHARD A. M ULLER, 1 F RANK A SARO, 2 M ICHAEL R AM, 3 and M ICHAEL R. S TOLZ 3 1 Department of Physics, University of California Berkeley, CA 94720, USA

Impact Event at the Permian-Triassic Boundary: Evidence ...

2000-11-20· Evidence from Extraterrestrial Noble Gases in Fullerenes Luann Becker,1* Robert J. Poreda, 2Andrew G. Hunt, Theodore E. Bunch,3 Michael Rampino4 The Permian-Triassic boundary (PTB) event, which occurred about 251.4 million years ago, is marked by the most severe mass extinction in the geologic record. Recent studies of some PTB sites indicate that the extinctions occurred very …

Dinosaurs and Petrified Wood - YouTube

2010-11-02· Dinosaurs and Petrified Wood evidence that debunks creationism. Earth's most severe mass extinction - an event 250 million years ago that wiped out 90 …

Extraterrestrial Helium in Seafloor Sediments ...

Farley, Kenneth A. (2001) Extraterrestrial Helium in Seafloor Sediments: Identification, Characteristics, and Accretion Rate Over Geologic Time. In: Accretion of Extraterrestrial Matter Throughout Earth's History. Kluwer Academic/Plenum Publishers, New York, pp. 179-204. ISBN 9780306466892. http

Is "Primordial" Helium Really Extraterrestrial? - [PDF ...

Is "Primordial" Helium Really Extraterrestrial? K. A. Farley . Among the isotope systems exploited by mantle eeochemists to deduce the chemical " evolution of the Earth, those of the rare gases are unique because they record the migration of volatile species from the mantle to the atmosphere. The isotopic composition of helium in mantle-derived rocks is now rea- sonably well known, and it ...

A Short Duration of the Cretaceous-Tertiary Boundary …

The use of helium-3 as a constant-flux proxy of sedimentation rate implies deposition of the K-T boundary clay in (10 ± 2) × 10^3 years, precluding the possibility of a long hiatus at the boundary and requiring extremely rapid faunal turnover.