Why has it been so difficult to examine the surface of Venus with unmanned probes?
◦ Solar radiation is so intense that probes are lost before they reach Venus.
◦ The atmosphere is so cloudy that it interferes with radio wave signals from earth, making communication with a probe difficult.
◦ The Venesian magnetic field is so strong it destroys electronics on the probes.
◦ The air pressure at the surface is equivalent to a water depth of nearly 1km on Earth, and temperatures are very high, which tends to destroy the probes.