A new study has revealed that the ancestors of chelicerates (spiders, scorpions, etc.) branched off from the family tree of other arthropods, such as including insects, crustaceans and millipedes, more than half a billion years ago.

Emissions standards are easy for politicians. They just consult some people whose opinion they happen to like and pick a number. 

Then it is up for science and engineering to make it possible, whatever the cost. 

In 2012, California approved standards to reduce emissions from passenger cars to 3 milligrams, or a millionth of an ounce, per mile over the 2017-2021 automobile model years. Part of the justification politicians used was a gross miscalculation by the California Air Resources Board, which overstated some emissions by 340% to make the problem look urgent.

Researchers have found evidence that magnetic waves in a polar coronal hole contain enough energy to heat the corona and that they also deposit most of their energy at sufficiently low heights for the heat to spread throughout the corona.

The observations help to answer a 70-year-old solar physics conundrum about the unexplained extreme temperature of the Sun's corona – known as the coronal heating problem.

The team analyzed data from the Extreme Ultraviolet Imaging Spectrometer onboard the Japanese satellite Hinode. They used observations of a polar coronal hole, a region of the Sun where the magnetic fields lines stretch from the solar surface far into interplanetary space.  

We've become a nation of defensive medicine. Health care is expensive not because of drug companies or overpaid doctors or malpractice premiums, but rather the largest cost for health care is administering tests to check off boxes and prevent legal problems in a future lawsuit that may never come.

No medical organization recommends the prostate-specific antigen test for older men, but many primary care doctors continue to administer it even to those over age 75.

Science has come a long way since 1978, when Louise Joy Brown, the world's first successful 'test-tube baby', was born.

Despite claims that these children were somehow going to be less natural, in vitro fertilization (IVF) has instead become mainstream, along with other methods to promote successful pregnancy. An aggregation of ten international reports tracking the use of Assisted Reproductive Technologies (ART) has led the International Committee for the Monitoring of Assisted Reproductive Technology (ICMART) to estimate that there have been 5 million babies born with the help of science and technology.

The endogenous hormone dopamine, induced by joyful classics as sex, drugs and food , triggers feelings of happiness - but that is not all. It remembers the state of happiness and keeps wanting to achieve it again. Dopamine enables us to make the "right" decisions in order to experience even more moments of happiness.