 SCP-561 changes the reproductive results of nearly all living things within its radius, causing them to produce offspring from species extant in the Pliocene epoch, the time period just before the most recent ice age. This effect extends to plants and animals alike, including humans. It should be said that the area around SCP-561 is not yet noticeably different from most other North American forested areas. The flora shows slight alterations only, due to the long generation time of larger plants. The area's fauna shows a steady increase in alteration as time goes on. Any animal life conceived in the radius of SCP-561 has a fair chance of producing Pliocene era offspring.