Why are there no animals with three legs?
If "Why?" is the first question in science, "Why not?" must be a close second. Sometimes it's worth thinking about why something does not exist.
If "Why?" is the first question in science, "Why not?" must be a close second. Sometimes it's worth thinking about why something does not exist.
Evolution
Oct 2, 2019
3
489
In 2007 the then President of China, Hu Jintao, delivered a speech to South Africans acknowledging the benefits of a strategic partnership. He also stressed that the connection is not merely pragmatic. It must, he argued, ...
Other
Sep 16, 2019
0
5
An exotic physical phenomenon, involving optical waves, synthetic magnetic fields, and time reversal, has been directly observed for the first time, following decades of attempts. The new finding could lead to realizations ...
Quantum Physics
Sep 5, 2019
23
4918
Dead or alive, left-spinning or right-spinning—in the quantum world particles such as the famous analogy of Schrödinger's cat can be all these things at the same time. An international team, including researchers from ...
Quantum Physics
Aug 13, 2019
4
584
Picture this: A bacteria-carrying asteroid is ejected from the center of the galaxy into the far reaches of space only to be "captured" by a distant solar system, potentially bringing life to a new world.
Space Exploration
Jul 9, 2019
5
70
If we want to get rid of fossil fuels nationwide, there is a lot to do. It will be a generation project, that much is clear. Empa researchers Martin Rüdisüli, Sinan Teske and Urs Elber have now calculated how long and steep ...
Energy & Green Tech
Jul 8, 2019
12
1
Heat flows from hot to cold objects. When a hot and a cold body are in thermal contact, they exchange heat energy until they reach thermal equilibrium, with the hot body cooling down and the cold body warming up. This is ...
General Physics
Jun 27, 2019
1
914
Physicists from MIT and elsewhere have performed the first run of a new experiment to detect axions—hypothetical particles that are predicted to be among the lightest particles in the universe. If they exist, axions would ...
General Physics
Mar 28, 2019
91
2257
A Virginia Tech professor was part of an international team of researchers that discovered new advances about the major ecological patterns driving the changes in soil biodiversity that occur over millions of years.
Earth Sciences
Mar 28, 2019
0
153
An old thought experiment now appears in a new light. In 1935 Erwin Schrödinger formulated a thought experiment designed to capture the paradoxical nature of quantum physics. A group of researchers led by Gerhard Rempe, ...
Optics & Photonics
Jan 22, 2019
0
945