Science

Yes. Hallucinations are false sensory perceptions; delusions are fixed false beliefs held despite contrary evidence.

Yes. Research shows girls’ average age at pubertal onset has fallen over recent decades, with more girls showing signs at eight or earlier; higher childhood BMI is a major associated factor.

Giant pandas belong to the order Carnivora but eat a nearly all-bamboo herbivorous diet, according to the Smithsonian’s National Zoo.

Groundhogs and woodchucks are the same species (Marmota monax). Pocket gophers are a different family of burrowing rodents (Geomyidae), per University of Missouri Extension IPM.

Gar flesh can be edible, but gar eggs are toxic. Check local consumption advisories.

Yes. Whales are marine mammals (cetaceans), not fish: they breathe air with lungs, are warm-blooded, and nurse live young, unlike typical fish.

Wildland fire is a natural ecological process in many ecosystems, often ignited by lightning, though most U.S. wildland fires are human-caused (NPS).

Flowering plants are vascular angiosperms with xylem and phloem. Nonvascular plants include mosses, liverworts, and hornworts.

Flying snakes (Chrysopelea) are mildly venomous and mainly a danger to small prey, not a serious threat to people.

Exothermic reactions have a negative enthalpy change (ΔH < 0); positive ΔH describes endothermic reactions that absorb heat.