News tagged with early
'Calm before storm' may foreshadow climatic tipping point
Space & Earth / Earth Sciences
Sep 17, 2008 |
3.6 / 5 (137) |
63
(PhysOrg.com) -- Abrupt climate change has occurred on earth many times over the past millions of years. Climate scientists hypothesize that these sharp transitions may be caused when the earth system reaches ...
Scientists propose new hypothesis on the origin of life
Space & Earth / Earth Sciences
Sep 04, 2009 |
4.8 / 5 (39) |
36
The Miller-Urey experiment, conducted by chemists Stanley Miller and Harold Urey in 1953, is the classic experiment on the origin of life. It established that the early Earth atmosphere, as they pictured it, ...
New Data Suggests We Don’t Live in a Void, and Supports Dark Energy
Jan 28, 2009 |
3.9 / 5 (36) |
75
(PhysOrg.com) -- An alternative proposal to dark energy in which the Earth sits near the center of a large void is undergoing scrutiny, and the results show that void models fit poorly with observed data. ...
Which way 'out of Africa'? New evidence provides an alternative route 'out of Africa' for early humans
Oct 14, 2008 |
4.7 / 5 (29) |
0
(PhysOrg.com) -- The widely held belief that the Nile valley was the most likely route out of sub-Saharan Africa for early modern humans 120,000 year ago is challenged in a paper published this week in the ...
A Superbright Supernova That’s the First of Its Kind
Dec 02, 2009 |
4.7 / 5 (24) |
6
(PhysOrg.com) -- An extraordinarily bright, extraordinarily long-lasting supernova named SN 2007bi, snagged in a search by a robotic telescope, turns out to be the first example of the kind of stars that first ...
Plate tectonics started over 4 billion years ago, geochemists report
Space & Earth / Earth Sciences
Nov 26, 2008 |
4.6 / 5 (23) |
0
(PhysOrg.com) -- A new picture of the early Earth is emerging, including the surprising finding that plate tectonics may have started more than 4 billion years ago — much earlier than scientists had believed, ...
Rogue Black Holes May Roam the Milky Way
Apr 29, 2009 |
4.3 / 5 (21) |
13
(PhysOrg.com) -- It sounds like the plot of a sci-fi movie: rogue black holes roaming our galaxy, threatening to swallow anything that gets too close. In fact, new calculations by Ryan O'Leary and Avi Loeb ...
Scientists Find Asteroids Are Missing, and Possibly Why
Space & Earth / Space Exploration
Feb 25, 2009 |
4.2 / 5 (20) |
1
(PhysOrg.com) -- The patterns of missing asteroids are like the footprints of wandering giant planets preserved in the asteroid belt.
Precise picture of early Universe supports 'dark matter' theory
Nov 02, 2009 |
4.8 / 5 (17) |
9
A detailed picture of the seeds of structures in the universe has been unveiled by an international team co-led by a Cardiff University scientist.
NASA Balloon Mission Tunes in to a Cosmic Radio Mystery
Space & Earth / Space Exploration
Jan 07, 2009 |
4.6 / 5 (17) |
15
(PhysOrg.com) -- Listening to the early universe just got harder. A team led by Alan Kogut of NASA's Goddard Space Flight Center in Greenbelt, Md., today announced the discovery of cosmic radio noise that ...
Giant stone-age axes found in African lake basin
Other Sciences / Archaeology & Fossils
Sep 10, 2009 |
4.3 / 5 (18) |
9
(PhysOrg.com) -- A giant African lake basin is providing information about possible migration routes and hunting practices of early humans in the Middle and Late Stone Age periods, between 150,000 and 10,000 ...
Researchers find oldest rocks on Earth
Space & Earth / Earth Sciences
Sep 25, 2008 |
4.2 / 5 (18) |
3
Canadian bedrock more than four billion years old may be the oldest known section of the Earth's early crust. Scientists at the Carnegie Institution used geochemical methods to obtain an age of 4.28 billion ...
Banded rocks reveal early Earth conditions, changes
Space & Earth / Earth Sciences
Oct 11, 2009 |
4.8 / 5 (16) |
1
(PhysOrg.com) -- The strikingly banded rocks scattered across the upper Midwest and elsewhere throughout the world are actually ambassadors from the past, offering clues to the environment of the early Earth ...
New book further supports controversial theory of 'Man the Hunted'
Biology /
Aug 20, 2008 |
4.6 / 5 (16) |
0
Despite popular theories to the contrary, early humans evolved not as aggressive hunters, but as prey of many predators. "Humans are no more born to be hunters than to be gardeners," argues Robert W. Sussman, ...
First black holes born starving (w/ Video)
Aug 10, 2009 |
4.2 / 5 (17) |
13
The first black holes in the universe had dramatic effects on their surroundings despite the fact that they were small and grew very slowly, according to recent supercomputer simulations carried out by astrophysicists ...
