The Mpemba effect is the theory that warmer water can freeze faster than colder water. Scientists have known the phenomenon since the time of Aristotle in Ancient Greece, but until now they have struggled to explain why.
Is it possible to make matter out of nothing? What about matter out of energy?
We are all travel through time… Traveling through time at the same speed as everyone else is inevitable. Take a look at the video to find out a lot about time and time traveling, in an simple way.
Dr Steve Rintoul, Dr John Church and Dr Pep Canadell of CSIRO discuss our climate science research to understand how and why the Earth system is warming.
Water is a special substance for several reasons, and you may have noticed an important one right in your cold drink: ice. Solid ice floats in liquid water, which isn’t true for most substances. But why? George Zaidan and Charles Morton explain the science behind how how hydrogen bonds keep the ice in your glass (and the polar ice caps) afloat.
Is time travel a fact or is it just science fiction? Thanks to time dilation and Einstein’s theory of relativity, we know that time travel can and actually does happen, albeit only in extremely tiny increments at the speeds and distances we can travel in space. If you add up the accumulated speed cosmonaut Sergei Krivalev has traveled in space – the most of any human with a total time spent in orbit of 803 days 9 hours and 39 minutes – he has actually time-traveled into his own future by 0.02 seconds.
Hank profiles this year’s Nobel laureates in science, whose achievements have helped us understand questions as small as how our cells transport materials, and as big as why matter exists at all.
Leaving science fiction aside, science does know scores of different ways to levitate things.
A molecule is nearly all empty space, apart from the extremely dense nuclei of its atoms and the clouds of electrons that bond them together. When that molecule forms, it arranges itself to maximize attraction of opposite charges and minimize repulsion of unlike. George Zaidan and Charles Morton shape our image of molecules.
Atoms can (and do) bond constantly; it’s how they form molecules. Sometimes, in an atomic tug-of-war, one atom pulls electrons from another, forming an ionic bond. Atoms can also play nicely and share electrons in a covalent bond. From simple oxygen to complex human chromosome 13, George Zaidan and Charles Morton break down the humble chemical bond.
Nuclear fusion is AMAZING. It’s set to revolutionize the way we power almost everything on the planet. And scientists are closer than ever to achieving a sustained fusion reaction. Trace tells you just how close these pioneering scientists really are.
The tiny atoms that make up our world are made up of even tinier protons, neutrons and electrons. Though the number of protons determines an atom’s identity, it’s the electrons — specifically, their exact location outside the nucleus — that particularly perplex scientists. George Zaidan and Charles Morton show how to make an educated guess of where those itty-bitty freewheeling electrons might be.
A peek at the early days of the Quantum AI Lab: a partnership between NASA, Google, and a 512-qubit D-Wave Two quantum computer. Learn more at http://google.com/+QuantumAILab