Intelligent design, Hovind Theory
Added:
The above are not scientific theories but more ideological assertions in nature. No positive evidence supports either assertion.
There is no theory that conflicts with the theory of evolution that has any evidence to support it.
None that can be called theories in the scientific sense.
If they are mathematicians they can prove a theorem. In the physical sciences theories cannot be proved. The current theory is the one that fits the experimental evidence more closely than all alternative theories. When a new theory comes along that is more accurate, the old theory is superseded.
a rock of an icerock
in the neighborhood of 14.5 billion years, from current evidence
Nothing. Current theories limited by assumption that speed of light is "fastest". Guess again fools!!
No one knows the answer to this question for certain, but scientists have several theories. The most widely accepted theory is that early Americans migrated via a land bridge from Siberia, to Alaska and Canada.
There is no current conflict in Portugal. People in Portugal like to live life peacefully.
When there are more convincing theories occur and proved experimentally, scientist will modify or change the current theories.
Yes
If they are mathematicians they can prove a theorem. In the physical sciences theories cannot be proved. The current theory is the one that fits the experimental evidence more closely than all alternative theories. When a new theory comes along that is more accurate, the old theory is superseded.
I'm not exactly sure what kind of answer your looking for, but if your asking about decisions made based on scientific evidence. The reason statements are based on "Knowledge at the time" is because later evidence or findings might cancel out the current decision. scientific answers are based on the exploration of theories, and until all theories can be exhausted, there cannot be a single answer to the given question.
The current conflict in Cuba is politically instigated. There are rebels that are associated to Fidel Castro who have destabilized the country.
a rock of an icerock
Not if the current theories about its origin and developments are correct.
Economy
The deflection of a magnetic compass in the presence of an electric current, is evidence that an electric current produces a magnetic field.
Theories that are talked about how to lick the "D" is not dicuss publicly.
New experimenatal data can lead to a better understanding of theories or can even disaprove them