The well runs deep
Trivia questions and answers, drawn fresh from the well
239,757 public questions across 1,818 topics. Challenge yourself, or build the perfect quiz for game night.
239,757
Questions with answers
1,818
Topics to explore
3
Depths of difficulty
Today at the well
1 / 5 0
In human genetics, what term describes two different versions of the same gene at corresponding chromosome locations?
Answer
Heterozygosity
In DNA structure, what sugar is attached to each nucleotide’s phosphate group and nitrogenous base?
Answer
Deoxyribose
What name is given to the first generation of stars formed from pristine gas in the early universe?
Answer
Population III stars
What is the name of the spherical region around a nonrotating black hole where light can orbit?
Answer
Photon sphere
What is the approximate temperature of the cosmic microwave background in the universe?
Answer
2.7 kelvins
0 / 5
Round complete
239,757 trivia questions
Every question has an answer
1,818 public topics
Something for every quiz
Free to explore
Reveal answers at your own pace
Fresh from the well
Latest trivia questions
What name is given to the first generation of stars formed from pristine gas in the early universe?
Answer
Population III stars
What is the name of the mathematical spacetime solution for a charged, nonrotating black hole?
Answer
Reissner–Nordström metric
What type of black-hole merger produces a damped gravitational-wave signal called ringdown after the collision?
Answer
Binary black-hole merger
What is the name of the formula linking a black hole’s entropy to the area of its event horizon?
Answer
Bekenstein–Hawking formula
What is the name of the hypothetical middle-weight class of black holes between stellar and supermassive black holes?
Answer
Intermediate-mass black hole
Who proposed the Penrose process for extracting energy from a rotating black hole?
Answer
Roger Penrose
What process describes a star being torn apart when it passes too close to a supermassive black hole?
Answer
Tidal disruption event
What is the name of the theoretical problem about whether information is destroyed inside evaporating black holes?
Answer
Black hole information paradox