Streak · 7 days+185 XP
7-Day Thought Experiment
Each day, write down one 'what if' thought experiment and reason it through in a few lines. Check in once a day.
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Science · Facts & stats · iChallenge network
The Einstein Challenge
Daily facts and stats about Albert Einstein's life and physics, plus real challenges to put them to work.
Today's 3 challenges
Einstein's 1905 paper on Brownian motion gave strong evidence for what?
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Level1Rookie
XPPlay a round to earn XP
Streak0days
LeagueBronzeweekly
Daily #29Resets at midnight UTC
Today's round
- 5 questions
- 20s each
- 0 played today
One ranked attempt per day. Practice as much as you like.
Challenges
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Proof+250 XP
Explain E=mc² Simply
Write a 100-word explanation of E=mc² that a 10-year-old could follow. Post it as a short write-up.
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Streak · 14 days+220 XP
Daily Logic Puzzle
Solve one logic or math puzzle every day for two weeks. Check in once a day.
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By the numbers
Live counts from EinsteinChallenge.com. All arena stats →
Facts in the pack12
Visitors, 30 days21
Challenge joins1
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First RoundFinish your first daily round.
FlawlessAnswer every question in a round correctly.
LightningA perfect round in under 25 seconds.
On a RollPlay 3 days in a row.
Week WarriorPlay 7 days in a row.
UnbreakablePlay 30 days in a row.
ExplorerPlay daily rounds in 5 different arenas.
GlobetrotterPlay daily rounds in 25 different arenas.
PolymathPlay daily rounds in 5 different topics.
In the ArenaJoin your first challenge.
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Fund a prize on EinsteinChallenge.com and your brand sits on the challenge card, the leaderboard and every finisher's share. Prizes only appear once they're funded, so players can trust what they see.
- Pick the challenge and the prize
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Questions
Do I keep rights to my work?
Yes — you own everything you create. Posting a score never transfers rights.
How are creative challenges scored?
Completion and streaks score points; community votes add bonus.
How does the daily round work?
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
How is my score calculated?
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Is it free?
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.