On April 1, 2021, the ISS live stream captures a bright spherical anomaly that appears to rise from the horizon, then the anomaly is growing brighter until it slowly fades out again and disappears from view.
Although the anomaly seems to appear from behind the horizon it is actually the Earth's motion that causes the anomaly to appear, and even though it is possible that the ISS live stream captured a sunset, sunrise or the moon we cannot rule out that the object is man-made or of extraterrestrial origin.