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Our solar system is believed to be around 4.5 billion years old, but it's difficult to know how long it actually took to form.  

The reason is, basically, our 'clocks'.  

Establishing chronologies of past events or determining ages of objects require having clocks that 'tick' at different paces - nuclear clocks used for dating are based on the rate of decay of an atomic nucleus expressed by a half-life, which is the time it takes for half of a number of nuclei to decay, a property of each nuclear species. Radiocarbon dating is the most famous. It was invented in Chicago in the late 1940s and can date artifacts back to prehistoric times because the half-life of radiocarbon (carbon-14) is a few thousand years. 
If a species´ reproductive strategy is evolutionarily adapted to the environmental constraints encountered by that species in its natural habitat, such as availability of food resources and predictability of the environment, and the aim generally is to produce the largest possible number of surviving offspring under particular conditions, then common dormice are defying that just a little.
In western countries there are 20 times more people aged 65 years andr older than one hundred years ago. With those demographic changes have come changes in brain research.  Understanding the mechanisms responsible for aging-related changes in cognitive processes, including spatial orientation, has become especially important for people’s everyday lives.
While cold fusion remains a pipe dream, fusion as an energy source for the future continues to be funded and improved. 

In nuclear fission, current nuclear energy, the nucleus of an atom is split, but in fusion two lightweight atoms join together.  The biggest benefit is no explosion.

The ITER project is seeking to turn nuclear fusion into reality and is making use of the Tokamak reactor for this purpose. Reactors of this type and the plasma used in them to carry out fusion have a number of control problems, and to solve them, electronics engineer Goretti Sevillano has come up with some tools in her thesis defended at the University of the Basque Country.
Researchers have discovered a previously unknown particle composed of three quarks in the Large Hadron Collider (LHC) particle accelerator. The baryon known as Xi_b^* confirms fundamental assumptions of physics regarding the binding of quarks.

 The baryon family refers to particles that are made up of three quarks and quarks form a group of six particles that differ in their masses and charges. The two lightest quarks, “up” and “down” quarks, form the two atomic components, protons and neutrons. All baryons that are composed of the three lightest quarks (“up”, “down” and “strange” quarks) are known. Only very few baryons with heavy quarks have been observed to date. They can only be generated artificially in particle accelerators, as they are heavy and very unstable. 

If you wear glasses, and they have been created recently, you are reading this article by looking through a tiny, transparent layer of nanomaterial. Anti-reflective coatings based on nanomaterials that reduce the amount of reflected light are used in most optical devices, including glasses, photo lenses, TV screens, solar cells and LED lights.

They could get better in the future. Some of the most efficient ARCs are made by mother nature and are found in the eyes of insects, like moths. The eyes of moths are covered with a layer of tiny bumps which are smaller than the wavelength of incoming light. This natural coating eliminates glare, hiding the moths from predators and improving their nocturnal vision. Some types of ARCs actually mimic the moth's eye.