For a recent paper, researchers examined monthly data on U.S. background checks for gun purchases and permits from November 1998 through April 2016, looking for purchasing trends after shootings during that time. 

When media coverage highlighted shootings, they found there were increases in handgun purchases. Only after high-fatality shootings were there decreases. The authors segmented results by the shooter’s race/ethnicity, the region where the shooting occurred, if a shooting was school related, fatalities, if it was a handgun or rifle, automatic or semiautomatic, the extent of media coverage level, and state political affiliation.

Ageism, discrimination against the elderly, has been reported in The Lancet Public Health journal as a problem for 25 percent of older people in England. And that is not truly old people, even those in their 50s face it. The repercussions are not just emotional, the study links the discrimination to worse health outcomes.

The Rainbow Papaya in Hawaii is a great example of how biology solved a devastating problem that nature created and chemicals could not fix. It put GMOs, the successor to mutagenesis, on the map worldwide, and today billions of meals have been served using GMO science.

Though lead levels across America are far safer than even a generation ago, the lack of a solid answer on what the safe level is leads to concern that leaching, such as from water pipes, could be harmful. 

As the crisis in Flint, Michigan a few years ago showed, the public can be put in a panic easily, and politicians will use public health concern for advantage, even after their decisions to stop using the science that had protected the public caused the problem.

When the Obama administration's Food and Drug Administration gave way to the Trump era, there were a number of positive changes in how the federal government treated smoking cessation tools that were not controlled by large corporations.

They rolled back the arbitrary framing that claimed all tobacco was as harmful as cigarettes - except Big Pharma products like nicotine patches and gums. They accepted that adults should have all options available for quitting cigarettes or at least reducing harm.

Methane detection in the Martian atmosphere haa been a source of debate because methane means a greater possibility for habitability and may even be a signature of life., but spacecraft and telescopic observations from Earth reported no detections of methane, at least not outside the realm of statistical wobble.

Finally, independent measurements report a firm detection in the Martian atmosphere above Gale Crater on 16 June 2013 by the Planetary Fourier Spectrometer onboard Mars Express, one day after the in situ observation of a methane spike by the Curiosity rover.