life's little mysteries
Latest about life's little mysteries
![Teenager in counselling.](https://cdn.mos.cms.futurecdn.net/WZ3EVNSNWTnfdUNhSVrvfh-320-80.jpg)
Can faking a smile make you feel happier?
By Tyler Santora published
Lab research often gives one answer about whether smiling can make you feel happier, but does that translate to the real world?
![Playful tuxedo cat raising paw showing claws on gray background with copy space.](https://cdn.mos.cms.futurecdn.net/ngHp5inbtjRKjCHpkwCNW8-320-80.jpg)
Why do cats' claws retract but dogs' claws don't?
By Skyler Ware published
Why don't dogs claws retract like felines' do?
![College student carrying his bag and laptop in campus. Young man turning back over his shoulder and walking in college campus.](https://cdn.mos.cms.futurecdn.net/jbEBwQTpKfGDj8rXLbvRVe-320-80.jpg)
Why do people feel like they're being watched, even when no one is there?
By Angely Mercado published
The causes range from innocuous media exposure to severe mental illness.
![Girl looking at herself in the mirror.](https://cdn.mos.cms.futurecdn.net/kdHbvqoVRfiBaZxD6ga6Ge-320-80.jpg)
Why do we lose so much hair?
By Marlowe Starling published
Hair shedding is normal, but when is it considered "hair loss"?
![A man laying in bed snoring](https://cdn.mos.cms.futurecdn.net/uL36f89Kgy3W33d5aZfgdD-320-80.jpg)
Can you hear yourself snore?
By Jennifer Nalewicki published
Are snorers immune to the sounds of their own snores?
![Primeval caveman wearing animal skin standing in his cave at night, holding torch with fire looking at drawings on the walls at night. Cave art with petroglyphs, rock paintings.](https://cdn.mos.cms.futurecdn.net/6hDpRC6ZmMqgS2XYgfiGp3-320-80.jpg)
Why did Europe's hunter-gatherers disappear?
By Patrick Pester published
There are many mysteries surrounding Europe's hunter-gatherers, but farming played a role in their demise.
![The smallest known vertebrate, Brachycephalus pulex, on a coin.](https://cdn.mos.cms.futurecdn.net/cppipwfuC5mBwVRZdsN2mk-320-80.jpg)
What is the smallest animal on Earth?
By Patrick Pester published
The prize for the smallest animal goes to a group of microscopic species.
![Newly hatched sea turtle crawls under moonlight to the water along a beach.](https://cdn.mos.cms.futurecdn.net/Yof4HjujR9ZA3zRVfmt3eP-320-80.jpg)
Do animals really have instincts?
By Marlowe Starling published
Do some species have instincts, or are these behaviors learned?
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