You might know blue whales are an endangered species while pandas are not. Yet there are 25,000 blue whales and only 2,000 pandas.  There are 100,000 sea otters yet they are still classified as endangered. Who drew that line between endangered and not endangered? And why are there suddenly so many more endangered species? A new tiny species might be discovered and someone is immediately petitioning government to declare it endangered, even though there may be lots of them and western ecologists just don't know it.

Sildenafil (viagra) is used to treat erectile dysfunction and is safe, with known side effects, but a few people have experienced light sensitivity and color vision impairment at the highest recommended dose.

That doesn't mean men who need it should stop taking it, the psychological consequences of erectile dysfunction are of more concern than side effects, which can include headache and blurred vision that disappear quickly. These occur because sildenafil was originally developed as a treatment for high blood pressure, and it also dilates blood vessels and relaxes smooth muscle in the penis, making it easier to achieve and maintain an erection. 

A recent paper finds that vaccine disinformation is common on social media while a few years ago I had employees watch food documentaries on Netflix and write about their impression and the results in both cases are startling for people who don't realize the extent of the problem. 

Those with conspiracy theories about the modern world can now gain a worldwide audience, using social media and free markets.

We know the left and right side of our brain are specialized for cognitive abilities like language (left hemisphere) and the right hand. That functional lateralization is reflected by morphological asymmetry too. The left and right hemispheres differ subtly in brain anatomy, distribution of nerve cells, connectivity and even neurochemistry.

It can be seen on endocasts. Most humans have a combination of a more projecting left occipital lobe (located in the back of the brain) with a more projecting right frontal lobe.

A U.C. Riverside environmentalist is sounding the alarm about your commute. 

Professor David Volz and colleagues hand-picked 90 commuter students who were given silicone wristbands to wear for five days. The goal was to find organophosphate esters on the wristbands, because some papers link those to harm in zebrafish and some epidemiologists will link anything to anything in humans.  They found one, TDCIPP - chlorinated tris - at higher levels and speculate that it is oozing out of car seat foam and into our bodies.

Just correlation, no testing

In a world of New York Times best-selling diet books and epidemiological claims about food and chemicals - even that if your mother used cosmetics it may have made you fat - it can be difficult for the public to know what to trust.

It won't be intermittent fasting, juice cleanses, or 10,000 steps, it will always be the calories. Energy balance matters, no matter how many times Center for Science in the Public Interest claims it's conspiracy to claim calories are why we gain weight.

Smallpox was wiped out by using mathematical containment rings coupled with vaccines and it makes sense that one way to contain an infectious disease outbreak is to limit travel.

Unless travel bans are only bans for some people. In communist China, elites are still going on vacation, they are still traveling for business, they are still going to foreign colleges. The novel coronavirus in Wuhan, China, now known as COVID-19, has infected tens of thousands and killing hundreds while spreading to at least 24 other countries. That led many governments, including the United States, to restrict travel to and from China.

Having trouble sleeping? Nervous about an important interview? Smelling your partner’s worn clothing may help improve your sleep and calm your nerves.

While it may sound strange to smell your partner’s clothing, these behaviors are surprisingly common. In one study, researchers asked participants if they had ever slept with or smelled their partners’ worn clothing during periods of separation. Over 80 per cent of women and 50 per cent of men reported they had intentionally smelled an absent partner’s clothing. Most of them said they did so because it made them feel relaxed or secure.

Mosquitoes rely on sense of smell to get what they need to survive. Females need blood to produce their eggs, so they find a host to bite and spots to lay eggs, while both males and females feed on nectar.

Their dominant source of food is nectar from flowers yet scientists know little about the scents that draw mosquitoes toward certain flowers, or repel them from others. Discovering this could help develop less toxic and better repellents, more effective traps, and lead to an understanding of how the mosquito brain responds to sensory information -- including the cues that, on occasion, lead a female mosquito to bite one of us.