Posts filed under “Science”
Dr. David Eagleman journeys into the future and asks what’s next for the human brain, and for our species. He reveals that in the future our descendants may be so different to us that we will be strangers to them.
THE BRAIN WITH DAVID EAGLEMAN Who will we Be?
Click for video
Almost half of Germany’s energy currently comes from coal. By 2050, the country hopes to get 80 per cent of its energy from renewable sources. This expertly shot short film from National Geographic offers a vision of Germany’s energy transition, and perhaps, the future of energy worldwide.
Source: Hubble Site
Source: BBC 2015
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution. The model accounts for the fact that the universe expanded from a very high density and high temperature state, and offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background, large scale structure, and Hubble’s Law. If the known laws of physics are extrapolated beyond where they are valid, there is a singularity. Modern measurements place this moment at approximately 13.8 billion years ago, which is thus considered the age of the universe. After the initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later simple atoms. Giant clouds of these primordial elements later coalesced through gravity to form stars and galaxies.
Since Georges Lemaître first noted, in 1927, that an expanding universe might be traced back in time to an originating single point, scientists have built on his idea of cosmic expansion. While the scientific community was once divided between supporters of two different expanding universe theories, the Big Bang and the Steady State theory, accumulated empirical evidence provides strong support for the former. In 1929, from analysis of galactic redshifts, Edwin Hubble concluded that galaxies are drifting apart, important observational evidence consistent with the hypothesis of an expanding universe. In 1965, the cosmic microwave background radiation was discovered, which was crucial evidence in favor of the Big Bang model, since that theory predicted the existence of background radiation throughout the universe before it was discovered. More recently, measurements of the redshifts of supernovae indicate that the expansion of the universe is accelerating, an observation attributed to dark energy’s existence. The known physical laws of nature can be used to calculate the characteristics of the universe in detail back in time to an initial state of extreme density and temperature.
Dr. David Eagleman explores memory as an important pillar of self, and reveals that rather than being a faithful record of our past, memory is fallible and often unreliable, making our life of memories more personal mythology than digital recording. THE BRAIN WITH DAVID EAGLEMAN: What Makes Me? Aired: 10/21/2015 Full video at PBS
In light of a recent study showing dietary supplements lead to 20,000 E.R. visits yearly (but out of how many total?), I thought we should revisit this issue click for ginormous graphic Source: Information Is Beautiful Dietary Supplements Lead to 20,000 E.R. Visits Yearly, Study Finds well.blogs.nytimes.com/2015/10/14/dietary-supplements-lead-to-20000-e-r-visits-yearly-study-finds/?ref=business