When did human ancestors begin to use tools? It is important to first understand a pitfall in thinking about how human traits were acquired. The problem arises from statements such as, "Walking upright on two legs (being bipedal) freed up the hands of hom
How did the lineage of extinct human ancestors change over the course of millions of years? What changes made our predecessors more humanlike? When did those changes occur and why?
Understanding human origins is difficult for a number of reasons. Foremost, among them being the bewildering array of fossils that have been discovered and to which, it seems, specimens are continually being added.
Who might you meet if you could visit Europe 35,000 years ago?If you ran across people who looked pretty ordinary, you'd have met Cro-Magnon people, or "European Early Modern Humans." However, you might run across folks who are somewhat shorter and stocki
I studied medium energy nuclear physics in graduate school, but I had been tempted to try plasma physics. Why had plasma physics intrigued me 37 years ago? I was excited by the prospect of plasma physics leading to an effectively limitless source of energ
Sadly, global warming has become politicized. Putting all the data together is not easy. However, there are ways of approaching the matter objectively. In the end, the conclusions each of us draw will depend on our different perceptions of risks and who w
On a clear night, some regions of the sky, such as the Milky Way, have higher densities of stars than others.
The Royal Society of London's first major publication was in 1665. It didn't anticipate this work would be a harbinger for a great leap in understanding of life. Within 15 years this august scientific society would find it necessary to abandon its ideas a
Comparing the general organization of the bodies of living and extinct organisms shows evidence of both lineal relationships and improvisation. Likewise, the DNA of organisms tells the same story.
Living things are wondrous for many reasons, but two stand out. First, all living organisms are related to one another. Comparative anatomy, embryology, DNA, the fossil record, the structure of molecules from which life is built and the metabolic processe
Monte Carlo is recognized as a Mecca for high stakes gambling. In the realm of computer software, the term "Monte Carlo" refers to a method of doing simulations of complex phenomena where odds play an essential role.
Most scientific endeavors require the application of some kind of mathematics. Foremost, it is important for modeling a wide variety of phenomena. And, where observations are quantifiable (measurable), it is used to characterize data.
A school science project designed to illustrate the solar system might include an assemblage of Styrofoam balls held together by wires. This is, quite literally, a model of the actual solar system in an easily visualized representation.Scientists develop
Upgrades performed on the Hubble telescope last year are now yielding images of objects that are 13 billion light years away. But how do astronomers know how far away those objects are?
It is awesome to imagine the principal elements making up our bodies, carbon, oxygen, nitrogen and a few others, have their origins in the incredibly hot cores of stars.The bulk of the physical universe is composed of basic elements. Ninety-two elements a
- NBC hypocritical with its violent shows 1 comment
- Writer labeled Republicans; here’s what liberals are 7 comments
- Tough love for the poor 22 comments
- Downtown Walla Walla parking garage plan options weighed 2 comments
- Carbon dioxide obsession causes real issues to be missed 16 comments
- Altering filibuster rules could haunt Democrats some day 12 comments