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Wang Yifang, chief scientist and project manager at the Jiangmen Underground Neutrino Observatory briefs visitors on the cosmic detector located 2297 feet (700 meters) underground in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Wang Yifang, chief scientist and project manager at the Jiangmen Underground Neutrino Observatory briefs visitors on the cosmic detector located 2297 feet (700 meters) underground in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

The $300 million detector is seen at the Jiangmen Underground Neutrino Observatory located 2297 feet (700 meters) underground in Kaiping in southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

The $300 million detector is seen at the Jiangmen Underground Neutrino Observatory located 2297 feet (700 meters) underground in Kaiping in southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Workers labor near the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Workers labor near the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Workers labor on the underside of the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Workers labor on the underside of the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Visitors take a train ride to visit the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Visitors take a train ride to visit the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Workers labor on the underside of the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Workers labor on the underside of the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Wang Yifang, chief scientist and project manager at the Jiangmen Underground Neutrino Observatory briefs visitors on a Photomultiplier Tube used to convert photons into electrical signal, of which 20,000 pieces are used in the cosmic detector located 2297 feet (700 meters) underground in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Wang Yifang, chief scientist and project manager at the Jiangmen Underground Neutrino Observatory briefs visitors on a Photomultiplier Tube used to convert photons into electrical signal, of which 20,000 pieces are used in the cosmic detector located 2297 feet (700 meters) underground in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Workers labor on the underside of the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Workers labor on the underside of the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

An aerial view of the Jiangmen Underground Neutrino Observatory where a cosmic detector is located 2297 feet (700 meters) underground in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

An aerial view of the Jiangmen Underground Neutrino Observatory where a cosmic detector is located 2297 feet (700 meters) underground in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

A worker labors on the underside of the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

A worker labors on the underside of the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Workers labor on the underside of the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)

Workers labor on the underside of the cosmic detector located 2297 feet (700 meters) underground at the Jiangmen Underground Neutrino Observatory in Kaiping, southern China's Guangdong province on Friday, Oct. 11, 2024. (AP Photo/Ng Han Guan)