range

"There's such a range of stuff now that people can essentially do all of their shopping under one roof," she added.

Kennedy has also linked UPFs with a range of medical conditions including cancers in young adults and mental health conditions.

Other creatures have visual systems that are responsive to different frequencies of light, with birds and butterflies able to perceive wavelengths in the ultraviolet range.

However, humans also benefit directly from having a wide range of plant and animal life in their surroundings.

Both individuals occupied two of the smallest home ranges ever recorded for adult males.