some people call Venus the second planet closest to our Sun Earth's twin.
but it is more likely the person who was talking about Earth's twin was on about Gliese 581c, it was the first found Earth like planet. it is 20.3 light years from Earth, which in the great scheme of thing is relatively close. it doesn't rotate on a axis though, so half of it is in constant night, while the other half is in constant daylight. also it is about 1.9 times the size of the Earth and 7-11 billion years old. which when our planet is about 4.5 billion years old and it developed us in just a few million years, give Gliese 581c a high chance of having not just life on it, but intelligent life on it. but Gliese 581c might not have liquid water on the surface, but it depends on what its atmosphere is like
Batman - Earth-Two - was created in 1939.
Superman - Earth-Two - was created in 1969.
The sun and the earth's interior are the two sources of energy that power earth's systems.
The answer depends on what it is that the earth is meant to be dividing. I was not aware that the earth divided anything in two halves!
The two motions that Earth makes are rotations and revolutions.
Two thirds of the Earth's surface is covered by water.
Mars has two natural satellites. Earth has one.
The two densest physical layers of the earth are the lithosphere and the asthenosphere.
Earth is three-dimensional, but maps are two-dimensional.
The two densest physical layers of the earth are the lithosphere and the asthenosphere.
the two seasons on earth that do not have seasons are spring and fall
The two densest physical layers of the earth are the lithosphere and the asthenosphere.