Should you get a pet? If so, a dog or a cat?  For families of children with autism, the decision may have gotten a little easier. A University of Missouri nurse has studied dog ownership decisions in families of children with autism and found, regardless of whether they owned dogs, the parents reported the benefits of dog ownership included companionship, stress relief and opportunities for their children to learn responsibility.

Humans depend on microbes for survival. So do most animals and such symbioses can persist for millions of years.

Scientists have discovered that certain wasps tightly control mother-to-offspring transmission of their bacterial symbionts. This stabilizes the symbiotic alliance and contributed to its persistence over the past 68-110 million years.

 A review of a dozen popular websites found that information on colorectal cancer is too difficult for most lay people to read and doesn't address the appropriate risks to and concerns of patients.

Carbon dioxide, in its ionic form bicarbonate, has a regulating function in the splitting of water in photosynthesis. This means that carbon dioxide has an additional role to being reduced to sugar, according to scientists at Umeå University in Sweden.

Tobacco is a high-density crop that is mowed several times throughout its cycle and that can be a good thing, because it can produce as much as 160 tons of fresh biomass per hectare.

Biomass that is suitable for producing bioethanol.  Smoking cigarettes is bad but renewable energy is good, tobacco just needs some help from science.

Singlet oxygen is an electronically excited state of oxygen that is less stable than normal oxygen. Its high reactivity has enabled its use in photodynamic therapy, in which light is used in combination with a photosensitizing drug to generate large amounts of singlet oxygen to kill cancer cells or various pathogens. 

Global warming may be a topic of debate and arguments about measurements and models, but some things are measurable right now, like environmental pollutants. 

Although persistent environmental pollutants are released worldwide, the Arctic and Antarctic regions are significantly more contaminated with persistent organic pollutants than elsewhere; marine animals living there have some of the highest levels of persistent organic pollutant (POP) contamination of any creatures and the Inuit people of the Arctic, who rely on a diet of fish, seals and whales, have also been shown to have higher POP concentrations than people living in our latitudes.

A new paper suggests that genes evolve more rapidly in species containing germ plasm, which
challenges a long held belief about the way certain species of vertebrates evolved. 

The results came about as the researchers put to the test a novel theory that early developmental events dramatically alter the vertebrate body plan and the way evolution proceeds. 

Dog owners in the Caucasus Mountains of Georgia might want to consider penning up their dogs more often: hybridization of wolves with shepherd dogs might be more common, and more recent, than previously thought, according to a recently published study in the Journal of Heredity (DOI: 10.1093/jhered/esu014).

Glacial cycles at 104-yr time scale have been the focus of Quaternary paleoclimatology over the last century. In recent years with the emergence of continuous high-resolution records (ice cores, deep-sea sediments etc.) from the longer geological past, increasing evidence underscores the significance of long- duration processes at the time scale of 105-yr or more. WANG Pinxian and colleagues from the State Key Laboratory of Marine Geology, Tongji University, reviewed long-term variations in the oceanic carbon reservoir and indicated their crucial role in major climate regime changes over Quaternary glacial cycles.