Which colorless, odorless gas do home CO detectors watch for?
AnswerCarbon monoxide
Carbon monoxide can't be seen or smelled, which is why detectors are used.
Science · Facts & stats
Toxic facts & stats
7 fact-checked facts about toxins, poisons and household chemical safety, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Which common food is toxic to dogs?
AnswerChocolate
Chocolate contains theobromine, which dogs process poorly.
Going deeper
Who is credited with the idea that 'the dose makes the poison'?
AnswerParacelsus
The 16th-century physician Paracelsus taught that any substance can be toxic at a high enough dose.
The phrase 'mad as a hatter' is linked to which toxic metal once used in hat making?
AnswerMercury
Mercury compounds used to make felt hats poisoned many hatters.
Bleach should never be mixed with which product because it can release toxic gas?
AnswerAmmonia
Bleach and ammonia react to form toxic chloramine gases.
Expert level
Which toxin is found in pufferfish?
AnswerTetrodotoxin
Tetrodotoxin, concentrated in organs like the liver, makes pufferfish dangerous if badly prepared.
Ricin comes from the seeds of which plant?
AnswerCastor bean
Ricin is a protein found in the seeds of the castor oil plant.
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