Edible honey discovered by archaeologists in ancient Egyptian tombs was found to be approximately how old?

Nature

What combination of natural properties allows honey to remain edible for thousands of years without spoiling?

Honey never spoils. Archaeologists found 3,000-year-old honey in Egyptian tombs still perfectly edible due to its low moisture and high acidity.

Nature

Since leafcutter ants cannot actually digest the leaves they cut, what do they use them for?

Leafcutter ants farm fungus they cannot digest, farming it like cattle for food—the fungus cannot survive without them, making it an enslaved crop.

Nature

During its nonstop transoceanic migration, what two cues does the bar-tailed godwit primarily rely on to navigate without landing?

Bar-tailed godwits navigate 7,500 miles over open ocean without stopping, using only magnetic fields and the sun.

Nature

What term do ecologists use for the risk Arctic goose chicks face when hatching no longer lines up with the brief peak in tundra plant nutrition?

Some Arctic geese time their arrival so precisely that chicks hatch exactly when plants peak nutritionally—delays of days mean starvation.

Nature

How many times must a Venus flytrap's trigger hairs be touched before the trap snaps shut?

Venus flytraps count prey touches: one triggers reflex, but trap only closes after two touches within 20 seconds—preventing false alarms.

Nature

What do dolphins use to identify and call to specific individuals across long ocean distances?

Dolphins name each other with unique whistles and answer when called by their individual 'name' across miles of open ocean.