Today's biggest science news: Comet 3I/ATLAS images | U.S. measles surge | Severe flu season

Comet 3I/ATLAS is set to reach its closest point to Earth overnight from December 18 to 19, 2025, marking a significant event for astronomers and space enthusiasts. This interstellar comet, the third of its kind detected, offers a unique opportunity for observation as it swings by our planet.

A recent study suggests that administering immunotherapy earlier in the day can significantly enhance survival rates for lung cancer patients compared to treatments given later in the day. This finding highlights the importance of timing in cancer treatment protocols.

Health officials announced measures to restrict access to gender-affirming health care for young transgender people in the U.S., a move that has drawn significant concern from advocates and health professionals.

Recent studies suggest that Titan, Saturn's largest moon, may be filled with 'slushy tunnels' rather than a vast ocean, indicating the presence of liquid in a different form than previously thought. This finding builds on earlier spacecraft observations that hinted at an ocean beneath Titan's icy surface.

U.S. diplomats have requested an exemption from a European Union law aimed at regulating methane emissions, arguing that the legislation would negatively impact American oil and gas companies. This request follows a deal signed by the Trump administration, in which the EU committed to purchasing American gas in exchange for tariff relief.

A recent brain-scan study has identified key components of the brain's navigation system, which may play a crucial role in preventing individuals from getting lost. This research sheds light on the brain's mechanisms that assist in spatial awareness and navigation, potentially offering insights into early symptoms of dementia.

A novel influenza variant known as subclade K is reportedly causing an increase in severe disease cases and hospitalizations across the U.S. and other countries. This uptick raises alarms among health officials as they monitor the impact of this variant during the ongoing flu season.

Recent studies indicate that polar bears in southern Greenland are undergoing genetic mutations, utilizing jumping genes to adapt to the rapidly changing environment caused by melting sea ice. This adaptation is crucial for their survival as climate change intensifies.