Which of these trees keeps their leaves during the winter?

Science Trivia / February 15, 2026

Pine Trees. There are 35 different varieties of pine trees grown in the U.S.

What product of burning fossil fuels can cause death by preventing oxygen from getting to cells?

Science Trivia / February 15, 2026

Carbon Monoxide. Carbon monoxide in higher quantities is highly toxic to humans and animals.

A phytotoxin is a poison produced from what?

Science Trivia / February 14, 2026

Plants. Phytotoxins are used primarily for weed control.

What type of energy sources can't be replaced readily within a 30-year span?

Science Trivia / February 14, 2026

Nonrenewable Energy Sources. Coal, oil and gas are non-renewable energy sources.

In which desert would the highest sand dunes be found?

Science Trivia / February 13, 2026

Sahara. The Sahara straddles the equator and contains the highest sand dunes.

What is a "placebo"?

Science Trivia / February 13, 2026

A Treatment With No Effect. A patient with high expectations about treatment will often improve even if it is a "placebo", an inactive substance like sugar.