Environment | The Guardian US<p>Light pollution causes urban birds to stay awake longer each day, study finds <a href="https://www.theguardian.com/environment/2025/aug/21/light-pollution-causes-urban-birds-to-stay-awake-longer-each-day-study-finds" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">theguardian.com/environment/20</span><span class="invisible">25/aug/21/light-pollution-causes-urban-birds-to-stay-awake-longer-each-day-study-finds</span></a> <a href="https://halo.nu/tags/Environment" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Environment</span></a> <a href="https://halo.nu/tags/Worldnews" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Worldnews</span></a> <a href="https://halo.nu/tags/Wildlife" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Wildlife</span></a> <a href="https://halo.nu/tags/Animals" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Animals</span></a> <a href="https://halo.nu/tags/Science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Science</span></a> <a href="https://halo.nu/tags/Birds" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Birds</span></a></p>