Mars may seem hospitable only for cute robots now, but 3 to 4 billion years ago it was warm enough to have rainstorms and flowing water, followed by a longer cold period where the water froze - a lot like earth. 

Scientists have long known that water was abundant on ancient Mars, but there has been no consensus on whether liquid water was common, or whether it was largely frozen in ice. Was the temperature high enough to allow the water to flow? Did this happen over an extended period, or just occasionally? Was the surface a desert or frozen? Warm conditions make it much more likely that life would have developed independently on the surface of ancient Mars.

If you read English newspaper The Guardian, you will be convinced farming is killing us all. Instead of being the negative they persistently insist, food is a basic resource, we will literally die without it, and the modern world is creating more food at affordable cost with less environmental strain and less energy than once even dreamed possible. Actual data show all land use combined, types of farming, forestry, etc. are only 23 percent of greenhouse gas emissions and not all greenhouse gases are equal.

In 2006, when Science 2.0 began, it felt like the world was ready for a writing network composed of scientists. There had already been two attempts, one failed and one wildly successful, albeit more focused on cultural issues than science.

The reason it felt time was because the public didn't trust journalists, who were (and are) often overtly partisan while scientists didn't trust journalists because they were (and are) often wrong. Why not make scientists the journalists?

An archaeological excavation on Mount Zion in Jerusalem has found clear evidence of the Babylonian conquest from 587/586 B.C. 

The discovery is of a deposit including layers of ash, arrowheads dating from the period, as well as Iron Age potsherds, lamps and a significant piece of period jewelry - a gold and silver tassel or earring. There are also signs of a significant Iron Age structure in the associated area, but the building, beneath layers from later periods, has yet to be excavated.

The use of social media is ubiquitous in today's culture. A recent Pew Research report found that, among 18 to 29-year-olds, over 90 percent use some form of social media while essentially 100 percent of young Americans (ages 18-29) have mobile phones, 94 percent of which are smartphones. 

Angiogenesis is a critical component for processes in wound healing and is defined as the formation of new capillaries from pre-existing blood vessels [1, 2]. Insufficient angiogenesis can result in impaired wound healing and chronic wound formation [4–8]. Electrical stimulation (ES) in its various forms has been shown to enhance wound healing by promoting the migration of keratinocytes and macrophages, enhancing angiogenesis, stimulating fibroblasts, and influencing protein synthesis throughout the inflammatory, proliferative and remodelling phases of healing [9–11].

An exquisite fossil specimen of an Eusthenopteron Fordi from the upper Devonian (Frasnian), Eescuminac Formation, Miguasha Park, Bay of Heat, Gaspé, Quebec, Canadian Museum of Natural History, Miguasha Collection.

If you look closely at this specimen, you can see the remarkable 3-D and soft-bodied preservation. This fish specimen reminds me of the ray-finned fossil fish you see in carbonate concretion from Lower Cretaceous deposits in the Santana Formation, Brazil.

Elon Musk has just tweeted about his "Nuke Mars to terraform it" idea. He talked about that some years back, in 2015 when many people responded with articles saying it is impossible. Now he is tweeting again.

This is surely just a joke. He can't be serious. Even 3000 nuclear bombs a day exploding over Mars as in his "minisuns" idea is likely not enough.

Here is his throwaway remark about it in 2015. It was reasonably clear he was not putting forward a serious worked out future plan for Mars. But is there any potential in the idea?

Another two harmless asteroids being shared in the sensationalist press. I am getting PM's from some really scared people about these. These two asteroids not only are harmless, they never were even considered for the Sentry table. And no they are not planet killers. They are not big enough to do more than have minor global effects like a few months of cooler weather because of dust in the atmosphere. Large enough to have some effects on the yields of our crops for one year. But that is an academic question becaue they can't hit.

To debunk:

A recent paper claims the ketogenic diet (basically the Atkins diet, except you can't sell new diet books using old names) will help with migraines.

Other more dangerous claims are that it will help with schizophrenia and epilepsy. The reality is that if the ketogenic diet could do any of those things, meal plans would be in double-blind clinical trials right now. Those diseases are a trillion dollar market.