The article discusses the transformative understanding of the Universe's expansion, emphasizing the discovery of dark energy in 1998. Initially assumed to be a competition between gravitational forces and expansion, cosmological advancements revealed that the Universe will continue to expand indefinitely due to this unknown energy source. Despite advancements in measuring dark energy's properties and ruling out alternatives, fundamental questions remain, particularly regarding its nature and implications, which lead to inquiries about testing various models and assumptions about dark energy's negative pressure.
"The shocking answer... is that it will expand forever, but that's because there's a new type of energy... dark energy."
"We still don't know what dark energy is, or what its properties truly are... could it be even stranger than most of us imagine?"
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