Like cats, human cells have a finite number of lives-once they divide a certain number of times (thankfully, more than nine) they change shape, slow their pace, and eventually stop dividing, a phenomenon called "cellular ...
Cell & Microbiology
Oct 3, 2010
0
0
Although most wolves in Yellowstone National Park live to be nearly six years old, their ability to kill prey peaks when they are two to three, according to a study led by Dan MacNulty and recently published online by Ecology ...
Ecology
Oct 26, 2009
0
0
(PhysOrg.com) -- A new theory based on studies of locations of large landmarks in Britain, such as stone structures, hill forts and earthworks, suggests they were part of a grid used for navigation around 5,000 years ago, ...
Archaeologist Magnus Artursson at the University of Gothenburg, Sweden, demonstrates in his thesis that societies during the Late Neolithic and Bronze Age had a significantly more varied and complex structure than was previously ...
Archaeology
Apr 9, 2009
0
1
Woolen clothing has been around for as long as humans have been wearing clothes and sheep have been domesticated. Indeed, our distant ancestors used sheep for three things: food, clothing and shelter—wool makes good insulation ...
Materials Science
Apr 5, 2023
0
3
Around 500 million years ago, early vertebrates in the seas became fish, adopting an inner skeleton and a flexible spine based on a nanocomposite of fibers and mineral, known as bone material. This "invention" of evolution ...
Analytical Chemistry
Dec 21, 2022
0
21
Population aging projections across the US show a divide between cities and rural areas, which could lead to pockets of vulnerability to climate change.
Environment
Oct 11, 2019
1
19
University of Liverpool academics have discovered what may be the remains of a 4,500 year old ramp system to transport the huge alabaster blocks used in the construction of Egypt's Great Pyramids.
Archaeology
Nov 5, 2018
1
143
The European Demographic Datasheet 2016, produced by demographers at the International Institute for Applied Systems Analysis (IIASA) and the Vienna Institute of Demography, provides a comprehensive look at key demographic ...
Social Sciences
Aug 31, 2016
0
0
Less is more, in terms of population, in the Malthusian view. In past debates on the links between population and development, many have emphasized population size and population growth as the main (negative) factor. Informed ...
Social Sciences
Oct 7, 2015
0
12
