The short answer is about 380 million years. This has recently been revised with new fragmented fossil evidence dating them 50 million years earlier than previously thought.
how long has deforestation been around
As long as guns have been around.
Humans vs Arachnids (bugs that have been around for 300 years that live on their main bug planet; Klendathu).
how long has the london eye been around for
As long as So Random has been around.
While most arachnids are terrestrial, a few specialized species have adapted to marine environments. The most notable ocean-dwelling arachnids are certain types of sea spiders, belonging to the class Pycnogonida. These creatures are characterized by their long legs and small bodies, and they inhabit various ocean depths. Additionally, some members of the order Solifugae, or camel spiders, have been found in coastal areas, but true marine adaptations are rare among arachnids.
Spiders are arachnids. Cats are felines.
No, arachnids do not have any antennas. Animals such as Spiders, or scorpions are considered to be an arachnids.
234 years fool
how long have boxing been around?
boner
They have always been around