New details of a nightmare period on Earth with surface conditions as frigid as present-day central Antarctica at the equator have been revealed thanks to the publication of a study of ancient glacier water.

The research, by an international team led by Daniel Herwartz, is published in the journal Proceedings of the National Academy of Sciences and shows that even tropical regions were once covered in snow and ice.

Bacteria have an immune system to fight off invasive viruses called phages, and like any immune system, from single-celled to human, the first challenge of the bacterial immune system is to detect the difference between “foreign” and “self.”

Since all living things are made of DNA and proteins, how do viruses and bacteria recognize their own? 

“In most environments, phages are around ten times more abundant than bacteria. And, like all viruses, phages use the host cell’s replication machinery to make copies of themselves,” says Prof. Rotem Sorek of the Weizmann Institute’s Department of Molecular Genetics. “And they are constantly evolving new ways to do this. So bacteria need a very active immune system to survive.”

While mandatory labels for organic or genetically modified foods have been regarded by the public as unnecessary bureaucracy, a group of analysts are calling for just that when it comes to wine.

Production methods and added chemicals can affect the color and taste and should be noted, the authors of a new study write. Dr. Heli Sirén and colleagues from the University of Helsinki analyzed the chemical profiles of eight Pinot Noir wines from different regions in the USA, France, New Zealand and Chile and they found that each wine had a different profile, affected by the processes used to make it.

Methane is a greenhouse gas with more warming impact than carbon dioxide but also fortunately a much shorter life in the atmosphere.

Due to the popularity of much cleaner natural gas, which has caused CO2 emissions to drop, there are concerns about methane but the big source is nature herself - decomposition of organic material, a complex process involving bacteria and microbes, is a big culprit.

When a heart attack strikes, the effects are lingering: heart muscle cells die and scar tissue forms, which makes future heart failure more likely.

Organic food is a gigantic profitable Big Ag enterprise ensconced in a health halo that glows so brightly the bulk of consumers believe it not only has no pesticides but actually contains no chemicals of any kind.

My concern about the science literacy of Whole Foods shoppers aside, from a purely practical point of view, if I were a farmer and walked into a store and saw berries for $8 a pack and hamburger for $10 a pound that has no difference but process I'd immediately ask why I am competing with giants over razor thin margins when I could segue into an area where price is basically no object.

The roles played by autonomous weapons will be discussed at a meeting in Geneva, Switzerland, this week which could have far reaching ramifications for the future of war.

The second Expert Meeting on Lethal Autonomous Weapons Systems (LAWS) will discuss issues surrounding what have been dubbed by some as “killer robots”, and whether they ought to be permitted in some capacity or perhaps banned altogether.

As a society we believe that our political allegiance depends on which party best marries up with our needs and values – and that these are shaped by our life experiences.

But research with twins suggests picking who to vote for in an election might have more to do with your genes than the policies of the parties.

Since we have been hearing about quantum computing for decades with no real applied breakthroughs, it may be necessary to use technology available now to edge close to computers that act like brains.

A team wants to create the functionality of a network of neurons using  memory resistors - memristors - which are resistors in a circuit that "remember" how much current has flowed through them.

Adolescent obesity is a national public health concern and, unchecked, places young people on a trajectory for a variety of health issues as they grow older. A new study from the University of Houston Department of Health and Human Performance (HHP) and Texas Obesity Research Center (TORC) suggests there is a relationship between long-term exposure to three specific types of family stressors and children becoming obese by the time they turn 18 years old.

Using data from the National Longitudinal Study of Youth, Assistant Professor Daphne Hernandez examined three family stress points ¬- family disruption, financial stress and maternal poor health - and applied those to data of more than 4,700 adolescents born between 1975 and 1990.