Will the earth last forever

Answer 1

Well if you mean as the Earth's location and the "World" then yes, It will always be here forever but in Scientific and actual term then no it wont. It's because in about 4.5 Billion Years the sun will run out of Nuclear Fuel and expand into a red giant and will obliterate earth in seconds along with the rest of the Solar System.

Answer 2

The solar hydrogen depleting as time flies. The sun will expand into a red giant in about 5.4 billion years later and may obliterate earth. Even if the earth won't get obliterated, just after Mercury is destroyed, the Earth's oceans will evaporate. We don't have to worry because it's an incredibly long time and human lives are much shorter than stellar lives.