Jackleo

The human visual system can detect a new image in about 10–20 milliseconds, and consciously recognize it in roughly 100 milliseconds.

Yes, there are tests for prime numbers. Methods like the trial division test, Sieve of Eratosthenes, and modern algorithms such as the Miller–Rabin test can determine whether a number is prime.

Stiffness after a long road trip or flight happens because you stay in one position for too long. This reduces blood flow to your muscles and joints, causing them to become tight. Your muscles also build up mild tension from lack of movement, and your joints don’t get the normal lubrication they need. Dehydration and poor posture can make the stiffness feel even worse. Moving or stretching briefly during travel helps prevent it.

Flowering trees and fruiting trees play an essential role in botany. Flowering trees showcase colorful blooms that attract pollinators, while fruiting trees produce seeds enclosed in fruits, supporting plant reproduction and feeding wildlife. Both types are vital for ecosystems, biodiversity, and human agriculture.