BIOLOGY

Though it may be annoying, sudden muscle fatigue during exercise is nothing to worry about. It's a byproduct of the way your body uses energy.

Smelling or touching the plants in the Poison Garden at the UK's Alnwick Castle could send you to the hospital.

Smelling or touching the plants in the Poison Garden at the UK's Alnwick Castle could send you to the hospital.

Pink flamingos’ ability to stand on one leg seems impressive—but it might be less of a balancing act than you think.

An echidna’s penis doesn’t have to excrete any urine, which may help explain why it’s fancier than a human’s.

We simply have to assume that at least one researcher made some reference to Harry Potter’s chocolate frogs when they found it.

If you get natural blond highlights in the summer, your hair may be damaged by too much exposure to the sun.