At the quantum level, the past and the future are indiscernible. That could have profound effects on the world we can see.

A new study reveals that opposing arrows of time can theoretically emerge ... after making the standard simplifying assumption to our equations describing open quantum systems, the equations ...

From that information, we can write a word equation to represent the reaction. The reactants are iron and oxygen, they go on the left hand side. Iron plus oxygen. We use an arrow to show the ...

When writing chemical equations for reversible reactions, the usual one-way arrow is not used. Instead, two arrows are used, each with just half an arrowhead (⇌). The top one points right ...