Thirty years ago today, on June 5, 1995 (May 8, 1995 lunar calendar), woodpeckers delayed the launch of Discovery. On June 5, 1995, NASA decided to postpone the launch of Discovery and move the space shuttle from the launch platform into the assembly hangar to repair the damage caused by woodpeckers on the insulated foam of its external fuel tanks. The space agency said that the woodpecker's sharp beak pecked through more than 70 holes in the rust-colored insulated foam between 6mm and 10cm in diameter. When Discovery was parked on the field launch pad, the fuel tank was 47 meters above the ground, so the crew has been unable to repair the hole that appeared on the top of it. The peripheral fuel tank of the space shuttle is reusable. On the one hand, the thermal insulation foam is designed to prevent the formation of water vapor on the outer surface of the ultra-low temperature liquid fuel when it is poured into the fuel tank, and then fall off during the launch and damage the fuselage of the space shuttle, and on the other hand, it is also designed to prevent the fuel tank from burning up during re-entry. Discovery was originally scheduled to launch from the Kennedy Space Center in Cape Calavernal, Florida on the morning of June 8 with five astronauts, and stay in orbit for five to eight days. Under the current circumstances, the launch preparations for Discovery can only be delayed, and the launch time may be mid-July. To this end, the launch schedule of the space shuttle Atlantis, which will be ranked after Discovery for a period of time, will be carried out in advance, and it is scheduled to launch on June 22 or later. The Kennedy Space Center is in the Merritt Island National Wildlife Refuge. It is often "harassed" by wild animals. On the launch pad of the "Discovery", there is a nest of woodpeckers. In the 14 years since the launch of the space shuttle was launched, it has been delayed due to various fields, but this is the first time it has been disturbed by woodpeckers. Since the problems caused by woodpeckers became public, the space agency has received a variety of novel suggestions from all over the country, including placing rubber snakes on fuel tanks that make woodpeckers afraid to approach, setting up strong lights or ultrasound waves that make woodpeckers uncomfortable, and spraying preparations with bitter or spicy flavors. The woodpeckers have not been seen since more than a week ago, when the Kennedy Space Center began installing six plastic owls on Discovery's erected launchpad, playing recorded owl calls and blaring their whistles to ward off the troublesome birds.