A sunflower is not one flower but thousands of tiny flowers packed together into what looks like a single bloom.

#plants

The Amazon rainforest produces about 20% of the world’s oxygen and is home to more than 10% of all known species on Earth.

#plants

Black holes don’t actually “suck” — instead, they warp space-time so strongly that nothing, not even light, can escape once it crosses the event horizon.

#space

People tend to remember emotionally charged events more vividly than neutral ones — this is called the “flashbulb memory” effect.

#psychology

The oldest known written recipe is for beer, dating back over 4,000 years to ancient Mesopotamia.

#history

The Rosetta Stone, discovered in 1799, was the key to deciphering ancient Egyptian hieroglyphs because it contained the same text in three languages.

#knowledge

Crows and ravens can recognize human faces, remember them for years, and even pass this knowledge to their offspring.

#animals

The Roman Empire at its peak stretched across three continents, ruling over about 60 million people — nearly a fifth of the world’s population at the time.

#history

The “placebo effect” is so strong that even when people know they are taking a placebo, they can still experience real improvements in health.

#psychology

The average adult human body contains about 37 trillion cells, all working together to keep us alive.

#science