Matter, though divisible in an extreme degree, is nevertheless not infinitely divisible. That is, there must be some point beyond which we cannot go in the division of matter. ... I have chosen the word “atom” to signify these ultimate particles.
Interpretation
Matter has a fundamental limit to its divisibility, known as atoms.
This quote by John Dalton emphasizes the idea that matter is not infinitely divisible and that there are ultimate building blocks, which he refers to as 'atoms'. Dalton's assertion laid the groundwork for the atomic theory, suggesting that all matter is composed of these indivisible particles, fundamentally changing the understanding of chemistry and physics.
In practice
In a science lecture about atomic theory, this quote could illustrate the concept of matter.
No new creation or destruction of matter is within the reach of chemical agency. We might as well attempt to introduce a new planet into the solar system, or to annihilate one already in existence, as to create or destroy a particle of hydrogen.
Climate change is the 800-pound gorilla in the living room that the media dances around. But in the scientific community, it's a settled question: 95 percent of scientists believe this is happening with 100 percent confidence temperatures are rising.
The politicized sponsors of this pseudoscientific nonsense should be ashamed to live, let alone die. If you want to take part in the “war” against cancer, and other terrible maladies, too, then join the battle against their lethal stupidity.
Africa needs roads. Roads bring know-how and fertilizer to farmers and ideas and business for commerce.
People look down on stuff like geography and meteorology, and not only because they're standing on one and being soaked by the other. They don't look quite like real science. But geography is only physics slowed down and with a few trees stuck on it, and meteorology is full of excitingly fashionable chaos and complexity. And summer isn't a time. It's a place as well. Summer is a moving creature and likes to go south for the winter.
I came to dedicate my life to opening space to the average person and crafting designs for new spaceships that could take us far from home. But since Apollo ended, such travels were only in our collective memory.
Astronauts will remain the explorers, the pioneers-the first to go back to moon and on to Mars. But I think it's really important to make space space available to as many people as we can. It's going to be a while before we can launch people for less than $20 million a ticket. But that day is coming.
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