Explain how you believe this. You can be simple in your explanation.
I believe in my posts and numerous other threads I have given an adequate explanation for the scientific explanation of supporting the scientific position for the history of our physical existence and the evolution of life, but nonetheless . . .
I am a geologist with over 50 years experience in geology across the USA and around the world. including 8 years in China, visiting Japan, Europe (great glacier geology,) Israel, and the Himalayas of India. There is no question that our earth is billions of years old, and life evolved over billions of years. The fossils are easy evidence for this in rock strata hundreds of thousands and billions years old. The strata of rock in orderly cyclic sequence of Sandstone (from beaches and wind blown deposits, shale (from shallow seas and lacks, limestones formed in the seas with coral reefs, and coal formed in vast forested swamps some with trees still stand with roots as they were covered by beach and wind blown sand. All these types of deposition are still taking place today as in the ancient rock layers. These rock strata are tens of thousands of feet thick in many regions of the world demonstrating the vast time involved.
The evidence of of gradual continental drift and mountain building are also specific evidence of an ancient earth.
There are many ancient lakes with thousands of annual thin soil deposits with a spring pollen layer in each layer. There are several lakes in the mountains of Japan with over 100,000 annual layers. This process can be observed annually in lakes all over the world today having a deposit each year.
There is absolutely no evidence of a Noah world or regional flood in any of these sedimentary deposits around the world. The claims of evidence of a catastrophic flood in various parts of the world can be easily explained by the evidence of local river floods, Tsunamis, land subsidence due to earthquakes, and some ancient local glacial floods. You do not need radiometric dating to confirm billions of year sof geologic history, but it is essential with other dating methods to give accurate time of the rocks and fossils.
The evidence is overwhelming supporting an ancient earth billions of years of and the evolution of life.