In theory, the speed of light, in a perfect vacuum, measured from an inertial frame, is constant with an exact value of 299,792,458 m/s.
A broad category referring to the study of the physical universe including nature and biology.
There is no limit to the amount of times one can fold a piece of paper in half if the paper is large enough. However, because the thickness of the paper grows exponentially, a lot of paper would be needed to make more than 8 folds.
Water is continuously mixed and recycled, so the odds are in favor of us sharing at least some molecules of it with Socrates, Jesus, Buddha, or anyone from past eras.
Casually Explained is a great video series, here is Casually Explained explaining evolution. I suggest checking out the overarching YouTube Channel.
To understand the climate change debate, it is important to clarify some confusion regarding climate change denial and skepticism.
Charles Darwin came up with the idea of natural selection, but he didn’t coin the phrase “survival of the fittest”, that was Herbert Spencer in 1864’s Principles of Sociology.
Flamingos are born with gray feathers. They become pink over time due to their aquatic diet of organisms like shrimp and red algae which are high in pigments called carotenoids.