The Kardashev scale is a method of measuring a civilization’s level of technological advancement, based on the amount of usable energy a civilization has at its disposal. The scale has three designated categories called Type I, II, and III. A Type I civilization has available all the energy impinging on its home planet, Type II all the energy of its sun, and Type III of its galaxy. Others have extended the scale to even more hypothetical Type IV beings who can control or use the entire universe, or Type V that control collections of universes. Metrics other than pure power usage have also been proposed, such as ‘mastery’ of a planet, system or galaxy rather than considering energy alone, or considering the amount of information controlled by a civilization rather than the amount of energy. Humanity is currently a Type 0 civilization, & should reach Type I within 100-200 years.
A Dyson sphere is a hypothetical megastructure meant to completely encompass a star and capture most or all of its energy output. Dyson speculated that such structures would be the logical consequence of the long-term survival and escalating energy needs of a technological civilization, and proposed that searching for evidence of the existence of such structures might lead to the detection of advanced intelligent extraterrestrial life.
Since then, other variant designs involving building an artificial structure or series of structures to encompass a star have been proposed in exploratory engineering or described in science fiction under the name “Dyson sphere.” These later proposals have not been limited to solar-power stations. Many involve habitation or industrial elements. Most fictional depictions describe a solid shell of matter enclosing a star, which is considered the least plausible variant of the idea.
The time difference between when Stegosaurus and Tyrannosaurus lived is greater than the time difference between Tyrannosaurus and now.
If you properly shuffle a deck of cards, in all likelihood, the resulting deck has never been seen before in the history of the world.
The bushes in Super Mario Bros. were just recolored clouds.
There is a blind guy who can ride his bike in traffic using echolocation.
There is a species of jellyfish that is immortal (turritopsis nutricula).
A small enough animal can fall at terminal velocity without suffering any injury upon impact. An ant (or even a smallish spider) dropped from a tall building will be just fine.
If you could fold a piece of paper in half 50 times, its thickness will be 3/4 the distance from the Earth to the Sun (71 million miles).
Over 3 billion people live on less than $2.50 a day (in USD using purchasing parity power), roughly half of the world’s population.
There are more cells of bacteria in your body than there are human cells. (Indeed, there are more cells of E. coli alone than of human cells.)
Computer hardware has fulfilled Moore’s Law for 40 years and may continue to do so.
The guidance computer from the Apollo 11 mission ran at 1.024 MHz, about 1/6th of the processing power of a TI-83 calculator, and it took human beings to the moon.
Humans landed on the moon, and it happened over 40 years ago.
When you see most stars, you’re essentially looking hundreds or thousands of years into the past.
It takes a photon, on average, 200,000 years to travel from the core of the Sun to the surface, then just a little over 8 minutes from the Sun’s surface to your eyeball, sliding in at 700,000,000 MPH.
If you cut up a hologram, the entire image is retained in each piece.
If Earth weren’t tilted on its axis, we wouldn’t have woodgrain, just “tree brown”.
Boston Red Sox slugger Ted Williams missed almost five full baseball seasons (1943, 1944, 1945, 1952 and 1953) fighting as a fighter pilot in World War II and the Korean War and still managed to hit 521 home runs.
A pencil has the potential to draw a line 38 miles long.
During metamorphosis, what happens in a cocoon is that most of the caterpillar gets dissolved by enzymes into a soup of undifferentiated cells and then the butterfly grows out of the same DNA.
In the 200,000 years since Homo Sapiens took her first steps across the African plains, just 57 billion people have ever lived — meaning over 12% of all the people ever born are walking the planet at this very moment
1 sperm has 37.5MB of DNA information in it. That means a normal ejaculation represents a data transfer of 1587GB in about 3 seconds