1) The smallest unit of time is known as a zeptosecond, which is equal to one trillionth of one billionth of a second.

2) The development of artificial intelligence (AI) has led to advancements in areas such as machine learning, natural language processing, and computer vision.

3) The Earth's core is primarily composed of iron and nickel and is as hot as the surface of the sun.

4) Greek mythology includes a wide array of gods and goddesses, such as Zeus, Poseidon, Athena, Aphrodite, and Apollo. These deities were believed to govern various aspects of life and the natural world and were often depicted with human characteristics and engaging in dramatic stories and conflicts.