The world-famous scientist Stephen Hawking published an important paper two weeks before he died, aged 76. He called it "A Smooth Exit from Eternal Inflation". He explained how humans could find multiverses. These are other universes made at the same time as our universe, after the Big Bang. He also wrote about how our universe will end, after the stars run out of energy. This paper could be his most important ever. He could have won a Nobel Prize.
Hawking explained his idea of inflation. This is when our universe was made from a tiny point in space. This was after the Big Bang. Hawking suggested there were many big bangs and each of them made a universe. All of these universes are a multiverse. Scientists could find the multiverse by using sensors on space ships. Stephen Hawking is also famous for his best-selling book "A Brief History of Time".